Which barrel length is best for an AR-15? We perform the ultimate tests.

Everyone argues but few do, today we put our money where our mouth is and perform some testing on different barrel lengths to find the best barrel length.
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[@trevorm0329]

I've found 3 inches is a very effective and versatile length. Served me well for years

[@Shark_Theory]

We are talking about barrel length not your...

[@MB-jg4tr]

That's Not what she said.

[@frankopanklaric]

Wow, very original...

[@hondomclean6759]

@trevorm0329 How thick is it? Is that the reason why you've lasted this long?

[@trevorm0329]

@Shark_Theory oh, OH, then disregard. Yeah, 11.3 is nice and compact, but you lose velocity and accuracy at range. I'd say 16

[@freeholdtacticalmed]

I’d love to have seen a 20” barrel against the 16”…

[@amn1308]

It starts to gain less per inch around 18", you still get gains just less.

[@bullphrogva1804]

Would have smoked everything on that table

[@hartsickdisciple]

Paul Harrell did a video on this. His results showed that the 20" didn't offer much over the 16.

[@Nicklafuego]

So 4 inches *is* just as good as 8 ?

[@KeepTheGates]

Let's get you to bed, grandpa.

[@georgelambo5145]

I think the main reason 13.7 exists is because of US firearms laws. 13.7 is the minimum you can pin and weld a good flash hider/muzzle brake while maintaining a rifle status. Also, this could have been a great collab between you and Paul Harrel, I mean he is the chrono master.

[@j.h.6328]

I think maybe you mean 14.5"... That's the bbl length I went with for my pin & weld upper. But if there are some 2.5" muzzle devices out there for that purpose it wouldn't shock me.

[@georgelambo5145]

@@j.h.6328 psa has been making 13.7 pin and welded for a couple of years now. As well as a few other companies

[@ALovelyBunchOfDragonballz]

​@@j.h.6328the biggest one is the SOLGW NOX.

[@slowmo7500]

@@georgelambo5145solgw 13.7” is the g.o.a.t. 13.7”💯

[@TheVvolfgang]

​@@j.h.632814.5 used to be the only option for pinned and welded until more recently

[@drewminiard7896]

Love the dad advice at the end. In college, a friend told me something his dad told him along the same lines of what you said: “Don’t talk about it, be about it”. I’ve always carried that with me and glad to see it being spread to the masses.

[@Synystr7]

I feel like not having the 20 inch, which is basically the control, is a shame.

[@user-fb1vm4uo1u]

the 20 inch just isn't the one that is being argued over in forums.

[@isaactrujillo76]

That’s what .223 was designed for. As you know.

[@OneSlowCbr]

@@isaactrujillo76I thought it was originally designed for a 22” ?

[@isaactrujillo76]

@@OneSlowCbr I believe that was the 222 Remington.

[@OneSlowCbr]

@@isaactrujillo76 thank you for the info man🫡

[@Eddythebandkid]

It was cool to see Micah’s transformation from behind the camera to in front of the camera. Even his own channel is very cool to watch.

[@ITSbigwillystyle]

It’s great to see these strapping young neurodivergent bucks GT has brought up turn out to be capable content contributors beyond techies.

[@JESUSCHRIST-ONLYWAYTOHEAVEN]

WHETHER YOU BELIEVE IN GOD OR NOT YOU WILL KNEEL BEFORE HIM ON JUDGEMENT DAY AND HE WILL GO THROUGH EVERY WORD YOU SAID/EVERY THOUGHT YOU HAD/EVERY SIN YOU DID. YOU WONT BE ABLE TO ARGUE WITH HIM EITHER. WITHOUT ACCEPTING JESUS SACRIFICE FOR YOUR SINS YOU WILL BE GUILTY. YOURE EITHER FOR GOD OR AGAINST GOD & THERE IS BUT 1 GOD (its not satan/buddha/allah). JESUS IS RETURNING VERY VERY SOON WITH JUDGEMENT! THINGS ARE ABOUT TO GET FAR WORSE THAN ANY TIME IN HISTORY. TURN FROM SIN, REPENT! TURN TO JESUS BEFORE ITS TOO LATE, WE CAN DIE AT ANY MOMENT! Jesus answered, “I am the way and the truth and the life. No one comes to the Father except through me."-John 14:6 "But whosoever shall deny me before men, him will I also deny before my Father which is in heaven."-Matthew 10:33 “For the wages of sin is death (hell), but the gift of God is eternal life in Christ Jesus our Lord”-Romans 6:23

[@arom519]

Israel did 9/11

[@Lohengrinner]

​@@Mrshucasfr? That's dope as hell

[@imivanm]

@@pvtschmuckateli283you got some videos to back those words up?

[@monkeyfinger7949]

This was a really great comparison of these barrels. Excellent job on this video!

[@user-py9qi5xp8b]

This video was both educational and entertaining. Great job, GT. Next up you should do velocity and POI changes with various silencers!.

[@shootinbruin3614]

In general: 10.3" - No real application over 11.5" outside of clone builds. The vast majority of the time 11.5" is the better choice. 11.5" - Negligible length increase over 10.3" that is especially disproportionate to the benefits in dwell time and velocity. The shortest length practical for most cases. 12.5" - The shortest length that can be commonly found with a mid-length gas system, although dwell time is such that it's ideally used with a suppressor. 13.7" - The shortest length that can typically be used with a pinned and welded muzzle device to bring it up to 16". Also is less ammo sensitive than 12.5" mid-length gas barrels, especially when unsuppressed. 14.5" - The most common barrel length for pin and welds before the advent of longer muzzle devices. Popular with GWOT-era clones. Makes mini / K suppressors more tolerable. 16" - The shortest non-NFA length that can be legally used without a permanently attached muzzle device. 18" - The shortest length that can be commonly found with a rifle-length gas system and the benefits to parts longevity and recoil associated with it. 20" - Extends reach of bayonet

[@wraithwyvern528]

You forgot the vibe-enhancing effects of 20" barrels. Vibes may not win a whole lot of engagements but firearms are shot at far more by cameras than by other rifles these days. Just think of all the flex pics you would take if you had an M16 with an M203 underbarrel or a transferable 3-Position fun hose.

[@shootinbruin3614]

@@wraithwyvern528 To be fair, select-fire and a launcher are flexes regardless of barrel length haha. 20" barrels not only enhance vibes, but check them as well. At least with certain ammo against some steel armor

[@sanctuarypest2212]

10 inches still hit 3k out the barrel with 55gr. Cool story though, bro.

[@shootinbruin3614]

@@sanctuarypest2212 ok

[@denmanfite3156]

​@@sanctuarypest2212lol 55gr

[@shooteveryday1841]

Choosing the correct barrel length: Step 1) get a 20” barrel. Step 2) that’s it. You’re done.

[@dixiegunnut1812]

Based

[@brentharrington9235]

Yup

[@kennyphelps1160]

Step 3) welcome to 1976!

[@blackonblack...9244]

And M193 ammo

[@Jordan-nc3zy]

It’s all fun and games with a 20” until you want to run a suppressor, get into a car, or walk through a doorway

[@schwabra]

This video was a perfect follow up to this discussion with my son. Thank you for hitting exactly what we could only talk about with an application of ammo to paper.

[@BlueBeretFirearms]

Wow, great video with incredibly useful information. My primary home defense rifle is my own build with a 14.5 YHM barrel with pinned/welded flash hider. After watching this I'm seriously considering doing a 10.3 build just because. Thanks for all you're doing. I just discovered your channel this week and have watched several videos. Lots more to go 😂

[@Just_come_back_to_reality]

2 months later? You're dedication to inform us is very nice to see. Thank you, man.

[@GarandThumb]

More to come!

[@1172603]

​@@GarandThumbbig Mike that tattoo making you look like a bad boy we love it

[@Christoph-sd3zi]

​@@1172603not a fan

[@thedude7726]

@@GarandThumb we love it when you come more

[@Just_come_back_to_reality]

@@Christoph-sd3zi Then why? Why are you even commenting on a comment of the video? Have some self awareness.

[@ktinga1]

I would have loved to see an 18" and 20" in this comparison as well.

[@DimitrosSJ]

Not from these posers..

[@FuzedBox]

@@DimitrosSJ These "posers" can easily outshoot you. If you think otherwise, put your money where your mouth is. I was also disappointed to see lack of >16" bbl lengths.

[@thespectator5259]

@@DimitrosSJ Wdym? Mike has worked in the Spec OPS community for years. That's about as legit as you can get. Sure, he does a lot of silly drills/montages and likes to pepper his videos with Gen Z memes, but the meat of the things he says once you get past the superfluous is sound. That he was able to borrow this many uppers from an upscale brand is already a tall order. Novesque only makes up to 18" so since they don't make 20" Mike probably thought it would ruin the barrel quality consistency aspect of this video if he got a 20" from another make. If he did get Novesque's 18", he would still get comments about the 20" and rightfully so since it wouldn't be right to have 18" but not 20" given the former is even more niche.

[@Darthdoodoo]

Those aren't cool guy lengths they don't exist to these guys

[@100BearPaw]

Superb information to have. Thank you for doing what y’all do.

[@PickupsAreNotTrucks]

Phenomenal info brother. Thank you. There’s so much heresy on the internet, it’s nice to see proof and testing done by an unbiased professional so we can all make our own individual decisions.

[@wizardsmokey]

I would have loved to see different ammo types explored as well. 55gr vs 62gr vs 77gr, etc. I know it would have made the video about 45 minutes long, but I don't think anyone here would complain about that!

[@Demonoid1990]

I don't mind longer videos when it comes to stuff like this. I'm kinda getting started on my gun venture, or at least ownership. Been watching firearms videos for years, but only recently got me a rifle and a pistol. Now I gotta put what I've learned into a more practical test on the range. Kinda like when I went to CDL school for trucking, we learned in the classroom for awhile first. But once we actually got behind the wheel in the course, applying that knowledge is different in a real-world scenario. 8 years later and now it's just second nature lol.

[@perkele1989]

A cut short/sped up video with just graphs of performance comparisons would be GOLDEN

[@budget.88]

Never forget the USS Liberty and the men who diëd on that day

[@awsomedude9111]

From Buffman Armor spreadsheet data, the heavier weights perform better with short barrels, but light bullets like 55gr perform well in any barrel, but you can still get a increase in velocity. His google speadsheet has multiple barrels, calibers, and ammo.

[@shawncoey637]

It’d be great to see 18” and 20” barrels too as well as 77 and 62 gr bullet weights as a comparison to the 55’s.

[@amn1308]

It starts to plateau, you still get small gains all the way to 22" just gets smaller and smaller while the weight gets further and further out there.

[@BaconSlayer69]

@@amn1308no 20 inch is the maximum actually beyond that it’s pointless for .223/5.56

[@vicdiaz5180]

@@amn1308the 5.56 round was designed to be shot out of a 20 inch barrel. So yes, there should be differences from 16” to 20” in terms of velocity

[@matthewconnor5483]

​@@vicdiaz5180the M16 was also originally a much slower twist rate so the those 55 were even less stable vs the modern 1:7 twist rate for heavier rounds.

[@vicdiaz5180]

@@matthewconnor5483 correct that slower twist rate was due to the barrel length. A more aggressive twist rate on a 20” would only reduce the performance out of a 20 inch barrel, but the powder out of the 5.56 cartridge stops burning around 19 1/2 inches, which is why many people in this common section are interested to see a comparison that includes the 20” barrel

[@BlackdogADV]

I’ve used and owned them all. At the end of the day I prefer the 16” but 14.5” is nice also.

[@user-vw7qe1cf9x]

Much appriciate your video. So full of real, tested info.

[@ph1shstyx]

Would have loved to see an 18 and 20 added to the testing

[@walterlancaster2230]

They are too tacticool for those lengths.

[@tjn2254]

A 20 inch ar is kinda dumb. Unless it's 308

[@medicchester]

Why not the 32 inch God barrel?

[@medicchester]

​@@tjn2254no no no.

[@jgt4862]

Yeah, that was my first thought.

[@forrestcoon231]

I think a sequel test to this could be in order. It'd be very nice to see ballistic gel testing with both 55gr and 77gr bullets at 100fps intervals to get a real idea of when expansion is going to be happening with any given barrel length

[@eatsshootsandleavestactica8068]

That's what I'd hoped this one would be, to be honest. I also think it would've been nice to see some extremes like 20" and 7.5"

[@ccooke8935]

@@eatsshootsandleavestactica8068 @Garand Thumb i'll lend my LWRC PSD 8.5 " to the channel if needed for a PT. 2

[@MarineVet]

Don't forget the 62gr. I use them quite a bit for some game and varmints out of a 24" barreled AR.

[@forrestcoon231]

@@MarineVet especially green tip, just as an example of why you shouldn't use it lol

[@leepatterson5710]

It really matters on the twist rate as well, there is a good variation for better twists between 55, 62, and 77.

[@MoistUwUCake]

I've learned more from you and your friends and the recommend research givin is good to build on. Thank you

[@howiedoo1111]

I love your videos! Thanks so much for doing these! You always have the best apparel gear as well! Recommendation: add affiliate links to the outdoor apparel you guys wear in your videos!

[@scottknott1087]

What about barrel girth? And don't forget the enthusiasm! It really matters in the grand scheme of things, isn't always about length

[@budget.88]

⌚️ Europa the last battle

[@budget.88]

⌚ 9-II Mis sing Links

[@nextcaesargaming5469]

You mean barrel caliber?

[@andrewmendez3231]

Garand scheme of things*

[@ClerkLIFE]

@@nextcaesargaming5469 no. The girth obviously. You don’t want short and skinny. 😂

[@SoloRenegade]

no test is complete without a 20in barrel to compare to. it's literally the benchmark standard.

[@roberthsieh8639]

30 years ago and for the marines

[@ThatGoat]

At that length you need a bayonet lug as well, because why not double as a javelin?

[@ltchap8424]

16" is the standard now

[@halogod0298]

@@roberthsieh8639I mean why not

[@JG_1998]

it's the benchmark standard if you're living in 1960s vietnam

[@ChadHuey79]

They’re all good. The positive to the 13.7 is, it’s just long enough to be able to pin and weld a muzzle device on that makes it a legal 16 inches. It’s the perfect middle ground barrel for that application. Beyond that, the other length barrels are better suited for there specific purposes. I own a 16, 13.7, and a 10.5. I kind of want an 18, a 20, and either a 11.5 or 12.5 though too. Just for the heck of it. I like them all. Build your collection big and get good with all of them! Amen! Good video, keep up the good work! Thanks

[@irondirectprimarycare9440]

I love my 16 inch real steel Daniel defense v7. I compared it to my buddies short barrel, and the Daniel defense biggest bonus was that it wasn’t as stinky. It wasn’t something that was mentioned in this video but gas fumes released from the short barrel along with a much louder noise was just obnoxious to shoot. The 16 inch D7 is an absolute pleasure to be around. The short barrel is like hanging out with that loud obnoxious friend who drinks way too much at the bar.

[@myworldofsports1376]

10.3 mk18 from DD is the GOAT 🐐. Nothing looks better. Nothing feels better. End of the day it’s about what the shooter wants. 11.5” gave the KZbinrs something different to push after 10yrs of talking the mk18 up. Gotta give it to manufacturers in finding a way to it something on the market ppl would find a excuse to buy & now the 16” is heavily being pushed by ppl who have a million SBR but will say they don’t want to go through the hassle of the paperwork when really it’s about getting free gear/weapons or great deals. I say pick a length & go have fun. Environment you live in should determine what length you pick. If your a range only guy 10.3-16” will all be more than the right tool.

[@UncleDon226]

16" is my favorite. I think it offers the best compromise between the 20" performance and the 11.5" maneuverability. Perfect middle ground for a general-purpose rifle.

[@almostontimehero5415]

14"-16" is the sweet spot. 10.5-12.5 just lack power for longer ranges or when a target is hiding behind a tree, a car or in a building. Short barrels have no penetration after 150yards.

[@PaulAmerican]

Just maybe thats why the 16" is the standard.

[@nathanflecke9635]

@@PaulAmericanno it has to do with the nfa.

[@n1ikc]

@@nathanflecke9635 What makes you think the USMC cares about the NFA? M16A4 barrel length is 20 inches

[@PaulAmerican]

@@nathanflecke9635 military doesnt need to follow the nfa. The military went from a m16 to the m4 w/16in barrel. Special forces went with mission specific barrels lenths but thats not the same conversation.

[@davidblanck4131]

As someone who has been making barrels for 30 years, and my family for over half a century. I'm loving this. We spent years doing research. But, definitely not with multiple rounds of modern rounds as we are getting out of the business. This was a fun episode to watch for sure. Just glad we had great results in comparison. Took a ton of research though.

[@astolt12]

How have you been doing this for years but never done such a simple test

[@davidblanck4131]

@@astolt12 I usually make things to the customers specs. Their development team usually does the testing. We get to torture test products. Which is always a ton of fun. But, we are usually going by already existing lengths. So, there is no need to do this kind of thing.

[@johndaniels1197]

@@davidblanck4131 So, when a customer asks for advice about which length to pick, what's your answer? "I don't know. We never tested that."

[@davidblanck4131]

@@johndaniels1197 No lol. They usually say "I would like 200 sten MK2 barrels, 200 sten MK3, 100 Garand barrels, 150 full auto uzi barrels of various lengths" etc. We make bulk parts to the customers spec. We are not developing 1 off parts. Sure, we have made just about every length AR barrel in wildly different calibers. But, the customer typically knows what they want before they order it. The only thing that we developed was some AR pistol that we don't make any more. As you may know. 7.5 inch .556 isn't exactly powder efficient. We usually do functional testing only.

[@beardly0121]

​@@davidblanck4131what's the name of the company your family runs? Also why are you getting out of the business? What are the downsides to industrial grade electrochemical machined barrels? I'm curious as to why more companies are not using that method as there are legitimate machines manufactured for it and it's a process that has zero tool wear and it is also a 100% burr free process yet as far as I know no major companies are using this method.

[@haymaker4956]

Great informative video. This is the video I’ve been looking for. Thanks

[@bradbeam7254]

This is probably one of the most informative videos that you’ve put out (for me). With having the ability to get as accurate of data as possible gives great kudos to the GT teams wealth of contact, knowledge and experience! Your videos are out together very well and aren’t longer than they need to be while also entertaining. Very understandable why GT is the “best” channel on YT. Please keep it up and thank you.

[@newskistewski5877]

Put*

[@AdamWeil]

It would be fun to see the difference of extremes of a 20+" barrel vs a super short 7"!

[@KevinWilliams]

The lack of NFA hassles make the 16" really shine IMO.

[@erikmcdoner4331]

Pin and welded 14.5 that has a suppressor ready flash hider also is GTG and popular around my area

[@Oliver0200]

​@@erikmcdoner4331what is pin and weld?

[@erikmcdoner4331]

@@Oliver0200 basically if you weld the flash hider / suppressor mount to the barrel it counts towards the over 16in min. PSA offers a couple 14.5 rifles / uppers with it and it's NFA compliant.

[@snactimusmaximus]

@@erikmcdoner4331 God's work. Thanks!

[@stoptrackingourdata8158]

@@erikmcdoner4331 yeah...but what's really the point? If you're adding a suppressor to a 14.5 and trying to keep it short with that, I see the point in a barrel under 16". But if you're just trying to keep it legal without a can, you're losing all of the velocity you get out of a 16" when you go shorter AND you're losing the maneuverability of a shorter barrel by pinning and welding a muzzle device on a short barrel to make it 16" overall. It seems like pin and welding a muzzle device is a net negative unless you're using a suppressor; and if you're using a suppressor, then you shouldn't really be worried about having an SBR.

[@erfanzamani2083]

I purchased recently a 12.5 ar15 and im very happy with it as a do it all rifle. Trying to get a can soon 😊

[@fell9654]

9:00 a scope longer than the barrel is really all that is needed

[@michaelswarts9548]

Yes🗿

[@Raccoonactual]

There's no such thing as overkill

[@agen1man]

The sight of that reminded me a scene from some movie where they decided to throw a huge ass sight on an MP5

[@agen1man]

Looked it up and it was from the original "Sniper" with Tom Berenger. Apparently it was some sorts of NVG scope.. still weird having that on an mp5.

[@sieve5]

If you've ever felt like you needed a really short barrel to compensate for your magnum dong, go ahead and hit that subscribe button.

[@SlimeSquare]

If you've ever dropped a monster condom so you could talk about your magnum dong, go ahead and hit that subscribe button.

[@budget.88]

Never forget the USS Liberty and the men who diëd on that day

[@HeavyPickr0010]

What about my ROMY Dong?

[@kylemorales3663]

i’m the other way around

[@benmiller5015]

In that case I suppose I better get like a 60in barrel n add a suppressor

[@saiga12forme88]

Appreciate your videos. Please continue with the evasion/tactics videos.

[@dylan_lewis9309]

Great video, like that you used barrels from the same manufacturer and prod batch! Would have loved to see a 18 and 20 in this. I've been running my mk18 now for a few years and love it for the environment I'm in, heavy wood and hills, most of the time I can't see more than 200 meters unless in a valley with a pasture. I am going to pick up a long boi 5.56 next because I have more 5.56 cans than guns at the moment

[@donovanferrari761]

It would be interesting to see each of these tested on ballistic gel at various distances.

[@ulrikerudel6859]

they didnt??

[@Nick-fm9ux]

​@ulrikerudel6859 daddy doesn't gel test. Ever.

[@SanchitC]

@@Nick-fm9ux*44 magnum dummy head explosion has entered the chat*

[@snarkyeconomist2141]

And with various bullets.

[@Foo909]

This is what I was hoping to see…maybe next time

[@josephtucciarone6878]

Thank you for the excellent contrast in you analysis. Great philosophy: Be a doer.

[@ragincajun993]

That intro/extro was awesome 😂 thanks for the video

[@nf1]

Would have loved to see an 18 and 20-inch barrel tested also!

[@ghostsmoke11]

@@moldetaco2281 i know a dude with a 20" barrel with the suppressor and the stock extended it's almost as long as he is lol, but it sounds like a laser gun so that cool.

[@budget.88]

Nëver forget the USS Liberty and the men who died on that day

[@dodgenbuell]

I have an 18" BCM upper, my 55gr reloads clock in around 3150-3200fps.. they are loaded fairly hot..

[@eamonnholland5343]

@@moldetaco2281 I've heard of quite a bit of variance in those tests. Some tests show only marginal increases in velocity from 16" to 18" and 20", but other tests show larger increases. In the tests with the larger increases (125fps muzzle velocity faster out of a 20" compared to a 16"), it can extend the reliable tumble ranges of M193 upwards of 25yds (18") to 50yds (20") beyond what a 16" barrel provides, which can make quite a bit of difference in combat settings.

[@dodgenbuell]

@@eamonnholland5343 been my experience with quality ammo that velocity gains of 50-75fps per inch is the norm.. anything outside of that is the exception and not the rule..

[@jonenglish6617]

I ran a 20 inch barrel in the infantry and I can't say I ever found it too long. But I wasn't doing secret squirrel stuff either

[@ChristopherKnN]

You learn to work with what you have. I ran with an A2 also. I knew enough about ballistics that I hated the M4 when it was issued.

[@paullinkins8121]

Ditto. My only complaints were the govt. profile barrel (heavy on the wrong end because of a flawed study on damage on the M16A1) and rarely having had optics for it (minimal numbers of PVS-4 in the unit). Didn't get to use the M4 but I'm pretty sure it would have worked great for everything we did too.

[@SoloRenegade]

I ran the M16A2 stateside, and the M16A4 with irons and the M4 with optics overseas. I liked the M16A4 and the M4 both. Would loved to have done qual with an M16A4 and an optic. But I could hit 500m with the M4 easy. never got a chance to shoot further, but confident I could have hit further still without much trouble.

[@dennisleighton2812]

There's the answer right there! If you had been I'm sure you'd have a LOT more to say.

[@DavidLLambertmobile]

In Plaster's non fiction book about MAC V SOG he wrote the SF teams liked the CAR15 5.56mm. That had a standard 16" barrel. I read too, the 5.56x45mm works best with 16" barrels to burn powder, get proper gas-rifle barrel spin.

[@TomRolfson]

A job for every length, a length for every job. What was not mentioned was stretching-out a longer competition barrel, but then losing velocity at distance and then stepping-up to 7.62x51 and my opinion for any practical application other than plinking is everything >300yds. Quality rounds then go from poking holes to producing pink mist. (To clarify we're talking about big game or anything larger than a coyote.)

[@alaskanbas6507]

Very cool to see the actual performance in a direct comparison like this, makes me interested to see a similar test but for AR-10s

[@fjalics]

I'm interested in what that hot 6.8 M7 does with different barrel lengths. If the pressure is still 80,000 psi when it exits the 13 inch barrel, I have to assume it will scream out of a long barrel, like the one on th M250. Better to be behind it, than in front of it.

[@Frankthetank-et7wo]

20 inches HBAR with the bayonet lug is pure perfection.

[@mrdankmemesbo1157]

clear rooms like chris kyle

[@bowlofrice8]

Hbar lmao

[@KorporalNoobs]

Not to forget the increased bullet damage due to the bayonet. When the bullet leaves the barrel and sees the badass blade on the way out, it will get competitive and try extra hard.

[@KeterMalkuth]

Not to mount the bayonet, of course, as a 20" with HBAR profile can be used as a mace. The bayonet lug is just to mock your enemies by demonstrating that with your 405 bench you don't need a handicap to kill them in melee.

[@brucestarr4438]

@@mrdankmemesbo1157 watch the Marine guard with a M16A2 in the Bourne Identity. Going up the stairwell in tight quarters. He has the buttstock over the top of his shoulder to shorten its length. Improvise, adapt, overcome.

[@Jason32Bourne]

Would be great to see gel tests out to distance with different lengths and especially using heavier grains. Also differences in using the 55gr vs heavier grains in terms of terminal performance and velocity sensitivity.

[@budget.88]

Never forget the USS Liberty and the men who diëd on that day

[@smolsnek3835]

​@@budget.88remembrance is useless if you do not train to avenge them

[@blondhairblackstrat]

20" . In 5.56, 55 grain, velocity is king. Fragmentation at longer distances and better armor penetration.

[@prairiepatriot2162]

I would've also liked to see how shooting suppressed effects velocity, particularly 10.3 since it is often used in that configuration.

[@Snuggles5000]

This is what I was hoping to see in this video.

[@paulpugh2480]

I have seen many,good demonstrations on barrel length, this is one of the best.

[@CivilianOperators]

Great testing. Appreciate you using barrels from the same batch.

[@MikeF421]

Years ago AR15 magazine did a barrel length velocity test using 5.56. They used the same barrel cutting an inch off and recrowning for each test. Don't remember the exact results, but do remember that around the 20 inch mark was the best velocity. All the powder was burnt in that 20" and anything over 20 lost velocity due to not enough powder and the friction of the extra barrel. Of course these results would change when using different calibers with larger powder capacity.

[@Appalxhian]

556 was intended for 20inch if im not mistaken

[@jaredsowers8630]

Seeing the 20” M16 would’ve been a great addition to the lineup. Ps. I’m digging the Tattoo Garand Thumb!

[@wattsmichaele]

Im impressed with your accuracy at 300 yards….excellent young man!!!!

[@beardedsheepdog2783]

Just wanna say brother you have one of the best tactical knowledge channels on here , literally go over everything i look at , i run a 10.5 but im not running it often due to ammo cost and me being a broke vet haha , GOOD CHANNEL GARAND

[@elliottdmann]

Well done, and very informative. Thanks for doing these tests; it helps me to understand the reality of ballistic performance while dispelling commonly held myths.

[@samstarkweather5172]

I think the biggest benefit of the 13.7 is legal convenience. It's pretty much the shortest barrel length you can go with a pin and weld without dipping into SBR territory. Sure, you can pin and weld a 12.5, but there's only a handful of muzzle devices you can use, and most of them are XM177 style flash hiders. It's really more valuable now with the legal fuckery surrounding pistol braces.

[@smolsnek3835]

The time for giving a shit what your handlers say has loooong passed

[@BeamMonsterZeus]

@@smolsnek3835 Amen. Also I'd argue the shorter length possesses nuanced performance benefits outside of a range environment which you'd prioritize over sheer **maximum** ballistic performance. Swings, carrying, fine-control, concealment, etc. are some such benefits.

[@lambchop777]

My thoughts exactly.

[@regulator18E]

​@@smolsnek3835​so what are you gonna do, aside from make edgy comments on YT 😂

[@stoptrackingourdata8158]

@@regulator18E uhhh...civil disobedience. Break the law.

[@pimpovic2]

I have/had 2- 10.5's, a 12.5, 14.5, 2- 16s, and an 18. They each have their role, but the 12.5 is such a sweet shooter. It may be the combo of buffer, spring, gas, e.t.c, but it's such a peach to shoot. I'd grab that baby for anything anything other than long range engagements, likely only because it has such a special character about it. Not sure if it's a fluke but I stumbled onto a sweet setup with that one. After that, I'd say it's the 14.5 with an Eotech. They really each serve a different role. It's too bad all but one were lost in a tornado. It's the strangest of coincidences.

[@mikecawley3997]

Just had to say HELL YES at the Foothills of Idaho! Love your videos Garand Thumb!

[@yourfavoritelawnguy2722]

This is why i love the AR platform, i can have dozens of uppers all done up to match the barrel length, while only needing a couple nice lowers.

[@politicallyinsensitive4200]

The 16" hasn't been forgotten; it's just the part of the cycle where the focus is 14.5. Just like optic height started with the top of the carry handle then went to super low and is now back at the top of carry handle height. Just like we went from carrying ammo/gear on our waist with ALICE to carrying it on our torso with MOLLIE and now back to "battle belts" we'll progress back to 20" barrels and then back to 16" at some point in the future.

[@michaelblacktree]

In a word, fads.

[@harmstrongg]

This. This comment right here. Same shit in optics. ACOGs are the best -> LPVOs are the best, ACOGs suck -> High power and canted dot -> ACOGs are best -> on and on and on and on

[@KeterMalkuth]

@@harmstrongg MPVO+piggy backed RDS gang. If only the market actually had new lightweight MPVO production, and Leupold still sold the MK6 3-18 on the civilian market. . .

[@OnSquareOnLevel]

100% correct. Hell, I ended up with a 16", 1-6x24 sfp, and an offset red dot... as basic bitch as you can get, but covers almost all of the bases. I love it because I'm comfortable with it... it works for me.

[@jiminysnicket86]

Not to mention the constant flirtation with 7 mm-- up or down, but nearly always one side or the other.

[@Jackal19x]

Love the educational content; would've loved to see an 18" on here as I run both a 16" and 18" but I'm guessing based on the diminishing returns we saw in this test that it wouldn't make that much difference at less than 500yds, which is the only reason I even own an 18" in the first place of course.

[@n.r.9468]

Man your last 15ish seconds hit me hard, the video was amazing, but the last 15ish was Epic!

[@andrewrobinson4019]

The expanding crew of the GT Ranch is starting to give Jacques Cousteau/Steve Zissou vibes. It won't be long before GT and Co. have retrofitted a giant soviet helicopter to house an armory, a shop, sleeping quarters, and a galley and they just fly around the world having guntoober adventures. I'm here for it.

[@NvwaAqoKy2kg]

Maybe buy an old oil rig, start building barracks on it. Make their own video platform where they decide what goes. Idk, they could call it something like, "GunTubere Sans Frontières" or something.

[@GeauxRussGeaux]

@@NvwaAqoKy2kgthat’s gonna make a great episode of “Love+Death+Robots”.

[@bobmatthew5012]

Do the interns get a Glock

[@andrewrobinson4019]

@@bobmatthew5012 No, they share one. They do get a Garand_Thumb branded Adidas, tho

[@JohnBrowningsGhost]

13.9 isnt there for ballistics, its there to get you to a 16 inch barrel length when pinned. Its the shortest you can go without needing a brace or a stamp.

[@bobvagene]

I found it odd he didn't mention that aspect. The whole reason for the odd 13.9 is the p/w length. I've never felt the need to p/w anything less than 14.5 but I get it. I have a ballistic advantage 14.5 urgi clone-ish upper and it's so accurate with the cheap aac 77gn stuff that I stopped even considering a 13.whatever.

[@Jake-ug2mf]

For most people I’m sure that’s true, I run my 13.9 as an SBR, suppressed, I wanted more velocity than my 11.5” but not as long as my 16” with a suppressor, I also wanted to run a mid length gas system. Overall it’s probably the smoothest shooting rifle I have, I also had the opportunity to put a former employers M16 lower under the upper and it was sewing machine smooth.

[@zacktaylor3499]

@@Jake-ug2mfyup, exactly - I built my 13.9 because the combination of that barrel length with mid length gas lends itself to extremely smooth operation.

[@HatsuneM1ku01]

Why not just get a 16 inch at that point and get the needle velocity. Your losing velocity on a velocity dependent cartridge just to get the same length barrel at the end of the day

[@8.6GivenAdqVacSysm]

Nice video, other than now I feel like my choice weren’t knowledgeable enough. But yes, the key factor is what does it do when it reaches the target. A gel test would be lovely as a follow up/part two.

[@perez5249]

Excellent video as usual 👍🏼

[@lighswarm175]

This was great, I'd love to see a part 2 where you expand the dataset. Do the 5.56 rattler like you showed in the thumbnail and add an 18 and a 20 for the long bois. Really show where the fall off in the bell curve is on either side.

[@ETHANR26]

go over 26 as well

[@blakehillusmc]

This video was both educational and entertaining. Great job, GT

[@ArtInTheWild24]

“You aren’t what you wanna be, you are what you are” Be a doer! Loved the vid, very informational thanks again Garand!

[@omikronairsoft6037]

God bless you man! this is really helpful. Thank you.

[@div1champs86]

Great video! I'd love to see this same comparison, but compared to the addition of a suppressor and the difference it makes for each barrel length

[@Mr_Dopey]

MDT SPORTING GOODS channel made a great video on this. They made a 6' barrel, fired it, collected the data, cut it down, then repeated to process. It was very interesting to see the results charted.

[@user-qo3yy9nv1u]

I'll be checking that out. Thanks.

[@natestain7103]

Damn

[@sfdclay]

A six foot barrel??

[@marcogenovesi8570]

@@sfdclay they are serious into science man

[@budget.88]

Nëver forget the USS Liberty and the men who died on that day

[@mikeyjack74]

14.5 pin and welded best I can do in California. Definitely like the feel of it. Love the videos!

[@mrfilamfishing]

You can do 13.7 in CA.

[@Happy-Trails-To-You]

The ejection pattern on all barrel lengths was very good. Since you used the same lower for all the tests, could you speak to the buffer weight you typically use and do you change buffers when running suppressed or do you have adjustable gas blocks. Maybe you address all that in another video that I have not spotted, but I do like how you did this testing. Excellent comparison.

[@mydakotablue]

Very informative! Would like to see similar videos with different calibers, especially 300BLK.

[@Jexorz86]

I love the physics of high speed projectiles, its facinating that all of those bullets are dropping at the exact same speed as one you drop from your hand

[@n.r.9468]

Man your last 15 sec hit me hard, the video was amazing, but the last 15 was Epic!

[@45th]

Great video. I love my 11.5's and 14.5's. Seem to be best all around.

[@cbrucesbiz]

I often wondered about the 10.3 vs the 11.5. This vide confirms, to me it is the best over all. I knew i should have not questioned James Yeager at Tactical Response when he told us that if you want to go small the 11.5 is the best to cover most any need. Yep I get the longer barrels reach out more and with the correct ammo you can get great results. Again for a short barrel rifle the 11.5 is the way to go. It works from room clearing, (don't do this along unless you have no other option), to most distances you and I will ever need to shoot. I will most likely never be a sniper on over watch so,... yea, 11.5 is just what I am going to build next. Great video guys.

[@mrdark9916]

I live in North Idaho, it really is amazing here. But around where i live we have more mountains ect especially around our family property thats backed up to miles of national forest. So for my main setup i opted for a Geissele 14.5 complete upper (deal of the century of $840 on black Friday) with a Steiner P4xi 1-4 scope and an offset Holoson 509T. With a Cloud Defensive Rein 3.0 rifle light, on an Aero lower with an SSA-E and ambi controls, and a Mini RC2 suppressor. Really is my Do-it-all rifle and it is absolutely outstanding. I love the Steiner because it gives me the Daylight bright reticle i wanted, but also has the 18" width standard for the BDC hashmarks allowing to range estimate very accurately on a torso shoulder-width much like the ACSS reticles but far less "busy". Ends up very similar to a red dot but able to make those hits at distance much easier. To me 55gr is training ammo. Real duty ammo is ESSENTIAL for fighting in my eyes . The past year ive busted my ass working days off and selling plasma (essentially made almost an extra $700+/month JUST for ammo, without touching my regular paychecks at all. So it was guilt free to spend.) and ive been stocking ammo HEAVILY while it was so affordable before the recent price hike. I have just over 7k rounds of various 223, M193 and M855 loads to fall back on for training. (I had a couole thousand to start with) But most importantly i prioritized stocking true duty ammo for the future "struggle" I have 1200 75gr Speer Gold Dot JSPs 1.5k 77gr Razorcore 2800 77gr OTMs from AAC (which ive been pretty darn impressed with for the price, my Geissele shoots them around 1.5 MOA, very happy with the accuracy). They are my go-to "longer range TRAINING" ammo, or ammo to fall back on. And 420 rounds of M855a1 (two full 7 mag loadouts) i scored a while back. I also have my old 16" BCM rifle built out as more of a DMR with a 2-10 and an offset 509T. So between the two rifle setups i have all the bases covered, and outstanding ammo on tap to defend our family and our property, pretty much concerned with out to 400yds depending on the area. But the 14.5 Geissele is my true main squeeze and its frankly superior to my BCM in every single way and was actually CHEAPER with the Black friday deal when i took into account the Surefire flash hider i needed to add for my suppressor, which the Geissele came with included. But im happy with my bases covered I also recently set up a cheaper 16" PSA upper with an ATN night vision scope i scored for $500 from a friend, for watching over the property at night, and hunting coyotes ect. Night vision and thermal are next on my list, saving for a PVS 14 now but this "surveillance rifle" got my foot in the door for capability at night and takem without giving away my position with white light. The ATN scope is actually pretty darn useable out to 2-300yds and my brother has one also so together we have decent capability. It has an offset Red dot for emergency use as well since the NV scope (although usable in daylight) is not ideal due to being digital, its more of a stationary solution for now but even once i have helmet mounted NV it will be great for someone else to use for surveillance. Jesus guys, just grab a damn 14.5 and train lol. And look at that drop at 300, you must zero at 50 like a muppet Real CHADS zero at 36, and put all the bullets in the actual target youre aiming at @ 300 😊 bags filled and positioned ect. Lots of emergency food storage, solar powered flood lights we can turn on/off at will or set to motion detection, tons of candles/batteries/medical/ a few cords of firewood cut/stacked/and seasoned ready to roll for the cabin and shop, a BUNCH of Fire extinguishers, and hoses that can be ran from inside out onto the roof for sprinklers (Im very concerned about fire suppression, one of the best ways to take down a hardened target is damn Molotov cocktails ECT 😂) just tons of preparations weve all worked hard, tried to be practical but also serious, chipped in money and resources and im so proud of it all. Long ways to go yet but its insane how much weve accomplished. Good luck and god bless brothers. Prep NOW before its too late. And whatever you do..... Don't get a useless 13.7..... hahaha 😊

[@paullane7489]

Best dad advice you’ve ever done in my opinion. It just spoke to me. Even good people get stuck talking about doing rather than actually doing. Good thing to be a doer for sure. 👍🇺🇸👍🇺🇸👍🇺🇸

[@gonzilla707]

I always like watching your videos when I’m sad or depressed. Reminds me of just hanging out with the boys.

[@connorlahner8411]

Mike and the team always clutching with the content

[@callsigncoyote7931]

I’d like to see this test with a 18”, 20” and 24”

[@drshoe8744]

Exactly! I use a 24" for varmints.

[@callsigncoyote7931]

@@drshoe8744 i saw it as an option on Aero’s website and I’ve been curious about it since

[@TheBuster0926]

I suspect that when facing 30-50 Feral and Invasive Texas Hogs 98% of people are gonna want that 20"-24"~ rifle ***AND*** Bayonet Lug. Why even risk *Not* having Peak Proformance when ones life is on the line?

[@callsigncoyote7931]

@@TheBuster0926 pretty much why my two primary AR’s are both 20’s (one A2 and one A4).

[@TheBuster0926]

@@callsigncoyote7931 I respect and admire your choice. I as a young one only had money for a decent SKS at 400$. I believe in Teensy-Stock BIG Barrel supremacy. People need to go back to knowing how to use Slings.

[@mtnbound2764]

recently did a 14.5" build and its become my favorite. none of the pistol or sbr stuff to worry about, and just feels better than a 16".

[@matthiwi6901]

I think its the safest choice because I have the suspicion that anything below 14 inch would be too slow to retain reliably tumbling and yawing in the targets tissues and also might be too slow for penetration of body armor

[@MGMan37]

@@matthiwi6901 Depends what rounds you are firing and what ranges you want them to be effective. Even a 10.5" will fire M193 at speeds that guarantee fragmentation and tumbling at short distances, extra barrel length just extends how far the rounds stay in the frag range. 77gr's perform well at way less velocity than M193. M855 just sucks.

[@SoloRenegade]

it's only not an SBR or pistol if you have a permanent feature extending the barrel length the 16in. if you have to have 16in anyways, might as well may it useful length.

[@MGMan37]

@@SoloRenegade Thankfully flash hiders and suppressor mounts count as useful length too.

[@mtnbound2764]

@@SoloRenegade right.. its called a 14.5" pin and weld. its quite useful. and unless one is running no muzzle device on a 16" barrel, which no one does, then the 14.5 is shorter overall by at least an inch or so depending on the muzzle device.

[@lafeeshmeister]

Whatever cameras and filters Garand Thumb uses are awesome.

[@LifeofBliss]

Love it. Thanks guys.

[@vinny5203]

10.3 barrel with a 6-36 scope should be the new standard

[@jeremy8715]

😂

[@christiantaylor2991]

with an offset red dot

[@HedgeMaster26]

@@christiantaylor2991 and offset sights.

[@Fireextinguisher945]

@@HedgeMaster26on either side

[@frosty3693]

Saw a S&W Model 36 with a 4X scope once. It was a temporary joke but still.....

[@jasestrong]

You guys do a great job, informative and fun .

[@rodross540]

This was such a great video. The data and science behind it, top notch. oooh raah.

[@antonw-uw4ov]

I run a 19" with a small 6" silencer in ipsc-competition. I find that it is cumbersome in ports but not in general. I can use the same point of aim from 100-300m. Something that is often overlooked is that long barrels are easier to shoot on the move. The gun without silencer is 5lbs. I think overall weight is much more important than overall length.

[@crimsintigerx2837]

I 100% agree I absolutely love my 11.5 with a hux werx can and I feel unbeatable with my tuned mid length gased 16 in. To me 14.5 is cool but it's inherently more money since you need to get it pin and welded more often than not for minimum gain in overall weight

[@jacklewis3444]

One thing I think people underestimate the importance of when considering barrel length/suppressor is overall weapon balance/weight, & if it will fit with your particular body type. I don’t purely just go off velocity alone.

[@GarandThumb]

precisely what we mention in the video

[@TimHPop776]

Great review 🎉

[@UtubeEric12345]

Something to keep in mind is that the ammunition used here is probably optimized for either 16 or 20 inch barrels. Ammunition optimized for shorter barrels would probably lessen the gap even more. However, one thing I have learned myself while tweaking handloads is that there is a challenge to get an 11,5 inch barrel to reach USPSA/IPSC power factor even with faster burning powders behind a 55 grain bullets. It gets closer but not entirely even with the 16 inch barrels even with a tweaked load.

[@kylek7523]

Seems like if you’re unsuppressed it’s hard to beat 16”. Good performance for the caliber and still decently handy. Plus no extra hoops to jump through for SBR now that the brace status is in question.

[@mikeborrelli193]

14.5 pin and weld is the same legal status as 16 as far as the Federales are concerned.. Some states like NY andr NJ expressly ban p&w at the state level but it's a small minority.

[@lucasbabcock7998]

Orrrrr, non compliance because it’s unconstitutional

[@0ffcamberxj]

​@@mikeborrelli193pin and weld isn't illegal in NY and probably isn't in NJ

[@mikeborrelli193]

@@0ffcamberxj It sure as shit is illegal in NY.. No threaded barrels and no muzzle devices wether P&W or not. If you live there better read the specifics about AR barrels and what is and is not allowed..

[@0ffcamberxj]

​​@@mikeborrelli193if you have a fixed mag you can do whatever you want, but that's dumb. However, there are multiple ways to keep a detachable mag (CA style) that the NYSP won't issue a ruling on and you can have whatever scary features you want. It's surely not ideal, but we're trying.

[@austinhuber3131]

Their sound recording of rifle fire is so clean. Probably the best on KZbin.

[@ogloc6308]

100%. they have the sound dialed in real nice

[@brandonedge1276]

Yeah...the short barrel does thrive in specific situations. Rear entry flowing thru the back door, the element of surprise is your only asset, a not so robust profile is one of the best mission advocates for successful outcome. Just have the right tools for the mission so that when she calls, mission go, we are all lights green.

[@travisbarrell]

Next you should do twist rate on same length barrels, ive heard army concluded that 1:9 was actually the best for fmj but they took 1:7, bc the m855A1 liked it better. Love these style videos. You guys rock don't change doc

[@Hardworkpays209]

In my opinion 1:8 is the best civilian twist rate it spins every bullet weight reliably.

[@bigghoss762]

This video should be called "What's the 2nd best barrel length?" because we all know 20" is the best.

[@vinsanity4203885]

​@@budget.88 O/