AR-15 Barrel Length & Twist Rate (Part I)

[@johnmckinney9505]

nice presentation. i just got a 5.56, 16in barrel in a 1:8 twist. looking forward to playing with it.

I'm an ex-combat MP, gulf war veteran/Iraq/ Kuwait. I cleared buildings, breeched doorways, shot from vehicles, short/ long distances, all with a 20" barrel M16A2. I own the 3 length barrels, 16,18, & 20". Each has a purpose, CQB, all around, & SHTF. My 20" rifle length DPMS 5.56 is my favorite. It's stupid accurate, extremely reliable, & good for short or long range. I use cheap 55/62gr FMJ & 62gr hpbt and the 20" works great with all of them.

[@jakeweston8616]

+fsteddie95 I agree. As much as I like my Colt 6920's, I bought a Colt AR15 A4 a couple years back and love it so damn much a just got another one last month ! I say we enjoy all the barrel lengths although I don't have an eighteen incher. I like to just copy what the military does. Acogs, M4s and M16s,,,

[@jakeweston8616]

The Navy Mk 12 is obviously a great rifle. My substitute for the DMR is a Colt AR15A4 with an ACOG TA31. Not a true DMR but the next best thing. A buddy of mine has a Danny Defense DMR like yours and loves it. If you are thinking about a floating barrel I would suggest a Colt M4 6940. I love mine and paid $1300. It will have a factory free floated barrel with a standard 1/7 6920 barrel. As you may know, the minute you pay more than the $1k mark you are buying things like free floated barrels, hammer forged barrels and factory installed match triggers. All of which are great for that extra degree of performance but not at all necessary. If you want a standard GI rifle for run'n gun and personal defense then there is no reason to pay more than $1k mark. Don't bother with the FN15. My nephew has one and although its a great rifle it doesn't cover all of the very basic milspec's that a regular 6920 does. It does not have an H marked buffer or staked castle nut (!?!) The fit and finish is great and at least they come with a carry handle, unlike Colt. But after seeing his, I was very glad that I didn't bother getting one. FYI the FN15 'tactical' or FN15 'DMR' may be an option for you.

[@davidgreener423]

What is the twist rate of your 20'' barrel?

[@jarredbierman9032]

there's a high pitch noise playing in the background

[@bermchasin]

when will youtube give us an onboard equalizer?!?!?!

[@travismuhler]

yeah, that was killing me!

[@LethalWeaponTV]

Just garbage mics I'd bet

[@brianwayne08]

I'll take the extra velocity of a 20 inch barrel vs any SBR any day. Depends on environmental factors of course but I'm definitely not going to be kicking in doors any time soon.

[@matjj676]

Exactly. It's a small caliber and depends on velocity. Short barrels look cool, but the reality is longer barrels are more effective and produce less flash.

[@MaxwellMetalworks]

Great video. Most straightforward explanation of ballistic performance as it pertains to barrel length I've seen yet.

[@umami0247]

Twist rate is a personal choice and is somewhat determined by the manufacturer as is barrel length it really depends on what your doing with your rifle and what rifle you buy.Some take it to the extreme some times with truck guns but again it's their choice. Personally I like the 1:8 it stabilizes what I shoot and I have 16 and 18 inch barrels and it works for me.

[@MichiganManiak]

I have a friend who's father was a green beret in Vietnam and he has photos of his father carrying a C.A.R. 15 with a vertical fore grip and a suppressor.

[@xxx_ray]

Snowdonkie can you find this photo and post a scan or take a picture of it?

[@ernestpaul2484]

Yes pictures would appreciated. There were S&W 9mm and some .45's fitted with suppressors, I have yet to see or hear of an XM177 being fitted with one or a vertical fore-grip. On the the subject of the XM177 carbine, which actually is what is considered pistol length now a days or an SBR with an 11.5" barrel, the video says XM155 which is probably just a "whoops".

[@TheMrwhite6199]

Cant wait to build my 20" ...I have a 16 556 now...going to also have a 18" but in 762x39

[@PrintWizard89]

Very cool information. I'm currently building my first AR15 and this is gives me alot to think about.

[@SHWELL11]

Nate is full of info. Great dudes doing great vids. We all win. Learn us something.

[@CaptainBerz]

SHWELL11 Thanks for the kind words!

[@BlackdogADV]

Good job Berz! I’ve been stuck on 16” but recently bought a 18” LaRue for my SPR. Since everyone was going bonkers over the 14.5 Colt Socom I bought one of those too.

[@ratherbecamping5564]

that dude knows his stuff.. I felt uncomfortable with my limited brain function. great video guys!

[@owenjosephking7396]

This is one of the most interesting videos on this subject I have ever seen !

[@shoppapa7238]

Well spoken. I'm just thinking about building my first AR. Caliber, length And twist rate is all definitely a factor depending on the nitch.

[@lexusvip4003]

2:35 100 yards or closer is about where I want my AR15. Anything longer than that and I'm gonna grab the 30-06 anyway.

[@Swish3r187]

I would like to see a dmr section with suppressor discussion (impact shifts, velocity lose or gains, and how it effects the projectile on certain lengths of a rifle). I know that is asking a lot Berz. Keep em coming brother.

[@cvjagman7489]

Great video. Perfect timing, Getting ready to build my first AR15.

[@TripleAAA53]

GREAT vids Berz !!!!! The info/barrel length JU-JU is OUTSTANDING ! THX to you BOTH !! Please keep them coming !!

[@tsafa]

Theoretical Question... 62 gr designed to move at 3100 f/s through a 1 in 8 barrel... Now if you run that same 62 gr through a 7.5 inch barrel at 2200 f/s... does it lose stability??? Should not the twist rate change ?

[@GeorgiaBoy1961]

@ tsafa: Reloaders/hand-loaders have long-known that if the twist rate is marginal, one can sometimes compensate for it with higher MV, and still get a well-stabilized bullet which does not keyhole on target. To answer your question, in theory yes the barrel length - and thereby attained MV - should have an impact on stability of your 62-grain projectile. The easier way would be to test it empirically, i.e., by going to the range and firing test groups with each at a variety of distances and studying closely the targets for signs of keyholing and degraded accuracy/stability. My hunch is that both examples will adequately stabilize the 62-grain bullet, but that the maximum stabilized range of the shorter barrel is going to substantially less. In other words, it will take less time and therefore less yardage for its flight path to decay. That stands to reason since it ought to go transsonic and then subsonic sooner, thereby becoming dynamically-unstable sooner. Your 62-grain bullet is tail-heavy naturally when at rest; what keeps it stable and in the proper nose-first orientation is the very high rate of spin imparted by the rifling. Once that decays, the projectile will begin becoming unstable and eventually its spin rate will decay such that it will exhibit greater yaw and finally "swap ends" as its spin fails to keep it nose-forward. A bullet not fully-stabilized as it leaves the barrel characteristically shows poor accuracy and "keyholing" of the target, for these reasons.

[@tsafa]

@@GeorgiaBoy1961 Great information. Thanks for taking the time to write this.

[@GeorgiaBoy1961]

@@tsafa -You bet... no worries.

[@thomasbroskie990]

WOW......Nate knows his stuff......Thanks for the info.........I'm getting ready to build my first AR and this helped a lot with some of my questions.........

[@cattledog901]

Wow, Nate is like the goddamn dalahi llama of the AR15 haha! Lovin the series. I'll stick with my 20" CHF FN barrel with an VLTOR A5 collapsible stock buffer on my DMR build. I think the Canadians got it right.

[@kwerner]

OUTSTANDING explanation! Really like this guy!

[@willterry6390]

It all comes Down to ammo in regards to 5.56 being lethal. The velocity loss from a 20 to a 16 inch barrel is minimal.

[@RhinoCable]

Great video, and great attitude from Berz letting someone with more technical know how take the lead.

[@asdfghjk2933]

I think an 18" 1/8 twist .223 wylde is pretty much ideal. For a SHTF build, it should sling 77gr very accurately at ~2750-2800fps.

[@CaptainBerz]

You are not giving up much of anything going 16". But I agree, 1/8 wylde is a great barrel configuration.

[@sophiansophian]

11.5" 1:7 5.56 CQC 75gr BTHP or 62gr FMJ going long

[@rayhanes1347]

Miss this era of the KZbin gun community

[@CaptainBerz]

Yup

[@1LSWilliam]

So useful. Where have you gone?

[@Docprepper]

So, realistically, a 7.5”-16” barrel combined with a standard 55 grain bullet will have effective terminal ballistics at 0-150 yards. When combined with the m855 rounds, it will penetrate, but won’t fragment effectively. Gotcha 👍🏼

[@asdfghjk2933]

realistically, a 7.5 won't make a m193 fragment at point blank. If you want to use FMJ, 16" minimum, 20" ideally.

[@Jakewolf69]

In the 90's I had no problem in urban area's with a 20" barrel. When I received the m4 I did not care for it. I guess I'm just old school.

[@rabbitdrink]

so how much of a difference does the 2-4 inches of shorter barrel make in closer quarters combat? am in california so ive never been able to feel either long or short barrels, ive only shot 30 inch shotguns

[@randelldarky3920]

I have two uppers. A 1-9 twist for shooting 55gr and a 1-7 for shooting 62gr. Am I right, is that a good combo?

[@kennardjohnson7875]

The first ar ever was a 222 and their is a few out their in private ownership,then 223,the 5.56x45 to up the the ability, in a 14 inch twist, then down 12 inch. 12 inch twist in 55 grain is the best for close to 150 yards. Unstable built tumbles and on a human body and does a good job.

[@zipper978]

The Marine Corps still uses the 20 inch m16a4 for the range and velocity. Army mostly uses m4.

[@Hohmies86]

No the m14 is the dmr ( designated marksmen rifle) the a4 has 16" barrel along with m16a2. The m4 has 14"

[@zipper978]

Taylor Nothnagel Uh no you are wrong. Both the a4 and a2 have 20 inch barrels. I would know I was a Marine

[@Hohmies86]

Your still wrong Hansen you are(former) marine as I am myself, I know it's 20, I just like gettin under peeps skin. YUT! And ur wrong about you was a marine not the 20" part, you will always be a devil dog

[@natesok209]

brothers chill out hoahhh!

[@batmandeltaforce]

Yup, same reason I always wanted an AR set up for 6mm REM:) That round can be a bush gun and using smaller grain get even higher velocities than the .556:)

[@Buffington916]

Right around the time you commented this, 6 ARC was introduced. If you haven't heard of it, I'd definitely check it out.

[@batmandeltaforce]

@@Buffington916 I know, I saw that and was highly encouraged... and I was hoping the military would embrace it. I guess it made too much sense:)

[@mr.kloworasoy9380]

Hi thanks for info. What do you think of 10.3inch barrel with 1:7 ? And do i need higher grain of ammo or lower? Thankyou... 🙏

[@husky701rider9]

Also could you guys cover gas tube lengths in part 2 or a separate video? Thanks great videos

[@p99guy]

In 1960, a 20" was a carbine lenth barrel... All the other US rifles in WW2 was 24", the post war M14 was 22" plus a long flash hider. The M1 Carbine had a 18"

[@umami0247]

Well actually the 20 inch rifle was standard length seeing how it was a 5.56 and the other rifles you have mentioned here where either 30-06 or 7.62. The carbine length came out in 66 with the CAR-15 in Vietnam when the military asked for a shorter rifle for special operations units. And this lead to the adjustable stock and a 15 inch barrel and round forward hand guard. That's is when the carbine craze started.

[@p99guy]

@@umami0247 No. that is not the start carbines, just the start of a shorter M16. Also see Musketoon lol

[@DocTacDad]

This is good stuff Berz!

[@CaptainBerz]

DocTacDad Thanks!

[@Ak47nutcase]

Good info. For myself 20in is my to go lenght! I understand shorter barrels but I'm a pretty big guy and a 20in fits me very well. The M4's are for the smaller frame people imho.

[@fabioleal3442]

what is better for 6.5 grendel ? 20" 1x8 twist and rifle , or 18" 1x8-5R and mid lengths ?

[@CaptainBerz]

I do not have experience with 6.5. But a lower twist is always better at stabilizing heavier bullets.

[@fabioleal3442]

CaptainBerz thanks for your attention , i appreciated.

[@NoGoBu]

When someone is shooting at you from 500 yards, you'll wish you had left that snub-nose phone booth clearing pea shooter home and had a 20" M-16A1 or A2. Trust me 🪖🇺🇸

[@CaptainBerz]

You don't need 20" to shoot 500 yards. LMAO. Even she said that!

[@dakotatrejo6196]

Does anyone know what brand keymod rail and flash hider the guy on the right has? I can't really find one I like but I like the look of those.

[@michael-lm5ng]

+Dakota Trejo looked like the BCM KMR but I might be wrong

[@mal-azzawy1812]

What brake/flash hider is that on your rifle, not the one Nate is holding the one you're holding on the right of the vid with the black barrel? Thanks and great vid much appreciated

[@kevinbrady75]

i just got done building a desitanted marksman rifle but i went with a 1/8 twist 20" stainless steal heavy barrel.223 wylde. do you think thats was a good choice??as of now I'm getting awesome results with it :) so much fun and make you appreciate what you built

[@CaptainBerz]

Sure, that will get it done!

[@CarlosRamirez-si5oe]

Hey Capt. I have a 16" barrel on my Ar15. Is that suitable for hunting white tail

[@ryannewland5572]

wish they would have posted the full version of the video. id like to hear what all the guy on the left had to say about the rifle and such.

[@YeomanArcher]

Four years later, how is your friends stainless steel barrel holding up? I'm in the great debate between a 416 stainless or melonited standard barrel. My uses is mostly target, hunting and tactical defense last, but I live near the ocean, so I'm thinking about corrosion resistence.

[@CaptainBerz]

Stainless certainly holds up!

[@Countryguy5967]

What about SHTF? Maybe having 2 uppers? One carbine and one SPR or DMR? I know it would depend on where you live. I live in heavily forested area in the Pacific Northwest just outside of the Cascae Mountain range. There are also large areas of open farm land, lots of hills, valleys, and canyons. I have M855, M913, and I'm looking at getting a few cases of Mk318 Mod 0 5.56.

[@heinrichvonkekelnazi393]

20" served the Corps well while taking Fallujah -- twice. Something the Army couldn't do in two attempts, with better equipment and more air and armor support.

[@boanerges5723]

Heinrich Von Kekelnazi maybe you should read up on who actually fought in the second battle of fallujah. It was quite a mix of troops and it was an escalation of forces in the area.

[@Okieundercover]

Will you be discussing sbr length barrels?

[@CaptainBerz]

Okieundercover We did cover SBR barrel lengths in this video in relation to the topic. Can you expand on what you would like to see? In part II there will be more discussion that might hit on the this topic.

[@simonferrer]

CaptainBerz Regarding this subject, Berz, can you give us some data on proper twist rates for AR pistol barrels? The most common lengths I'm seeing on the market are 7.5" and 10.5", all done in standard 1 in 9 twist. I'm setting up to do an AR pistol build and would like some advice regarding ammo and barrel to get the most juice out of the shorter platform. Thanks bro!

[@renaissancejack6592]

I'd rather opt for a 20" barrel. I couldn't justify the marginal benefit of an 18" barrel over a 16" that I already have.

[@UncleDon226]

Makes sense to me. I have neither, so I think I will go middle of the road and build 18"

[@jumper87]

Berz, is the gripstop considered a vertical fore grip or angled fore grip ? I would like to put one on a future pistol build but have concerns with ATF compliance.

[@CaptainBerz]

Sneakywakiki Variable Angle...

[@GlocknLoad1]

Interesting video Berz. Got a Model1Sales 16" upper in 5.45 with 1:8 twist earlier this year. Read articles on twist rates. Those rounds keyhole terribly with less twist. Think my CAI AK is same twist, same barrel length. Put on paper at 100, no keyholes. Been busy and have not been able to test it much. Again, good video.

[@BrandonD95]

are there vids on the 2 ARs

[@Fastflyingpigs]

The best and most informative video on the subject ..

[@swoelkers]

Great video! Very informative... Looking forward to part two.

[@salemsblood]

I've seen vids of guys with twenty Inch barrels punching through ar 500 armor due to higher velocity. Do you think that can be done with an 18 inch barrel?

[@CaptainBerz]

Doubtful they can punch through AR500 armor with FMJ or anything non steel cored.

[@McMintyMP]

LOL SURE

[@leonotthelion]

+CaptainBerz saw a video on KZbin where they tested that armor. Somewhere between60-90 green tips fired, two rounds penetrated. obviously realistically speaking, you'll never be shot at 60 + times in the chest plate.

[@boanerges5723]

CaptainBerz doesnt that depend on the thickness of the ar500?

[@mrdark9916]

Depends. On Level III armour, which is rated for 7.62 NATO by AR500, even the XM193's can penetrate fully. You need Level III+ armour to reliably stop the M855's.

[@lostboys111]

what kind of muzzle break is on that stainless steel ar

[@Brett235]

The way I see it is if I'm going to be shooting anything past 150 yards I grab my 270. If um hog hunting in a thicket or shooting less than 150 I grab my ar, it's that simple for me. I understand that in a combat scenario yiu can't do that but for all other purposes I can.

[@ianshepherd6476]

Is there a part 2? Awesome video...

[@CaptainBerz]

Ian Shepherd Coming out today in 9 minutes...

[@mtrevino12]

What kind of muzzle breaks are those 2 on this video

[@pepeman3099]

they refuse to answer this question

[@1nMyDreams]

what kinda of barrel does the guy on the left have on his ar?

[@blindfredy6128]

That was interesting, who’s the bloke on my left(your right.

[@cothran1980]

What kind of angled grip is that?

[@FinalLugiaGuardian]

Are there any manufacturers that produce a 20 inch barrel with a 1 in 9 twist?

[@CaptainBerz]

I’d Go 1/8 or 1/7. For heavier bullet stabilization.

[@FinalLugiaGuardian]

@@CaptainBerz But that does not answer my question. 1 in 9 out of a 20 inch barrel spins considerably faster than 1 in 9 out of a 16 inch barrel.

[@weaponsarefreedom7398]

Anyone know what kind of handstop that is?

[@dan16802]

basically spent the whole video explaining why the 20 inc barrel is superior in every aspect BUT in confined spaces such as a house, only to come to to conclusion that you would never build a 20inch upper. o.0 20 inch uppers have their place and are better in just about every scenario past 100 yards. if you use your rifle for just target shooting and or hunting - 20 inch. if you use it primarily as a ranch rifle - 20inch if you use it primarily as a home defense rifle - 16 inch there is no reason to limit your ballistic capability unless your surroundings absolutely require that you do. the only reason most people steer away from the 20's now a days is because its not general considered as "cool" The AR15 market is flooded wit trend following zombies. A 20 inc rifle with a collapsible stock is only an inch or two longer than someone holding a fully extended handgun.

[@krixig]

If you look at the muzzle velocity charts of an 18" vs 20" barrels, that's where the "law of diminishing returns" really takes effect and they become kind of arbitrary. He said he'd opt for an 18" for a dmr style rifle due to this. If you think 20" is great, then by all means dive on it. I think even a 24" would be cool, but it's ultimately cosmetic in the end and that much more of a pain to store and move with. Really you only want a barrel that's just barely long enough to accomplish what you want it to though, in the end.

[@krixig]

Btw, we have 20" rifles in our towers at work and 16"s for our mobile positions, however we have the option to use the 20's during training. I'll tell you what, they're fine static-wise but they're a fucking pain to run around with. It's like the guys that pack their kitchen sink when going hiking. On paper, it sounds great. But actually hoofing around with it, it sucks.

[@anthonygonzales6029]

Dont you worry I'm bringing the 20incher back into style ;)

[@matjj676]

What Dan said right here... Someone frame this.

[@Buffington916]

​@krixig did you happen to work security at a nuclear plant? Lol

[@macktavor2208]

A video worth archiving!

[@zack9912000]

.223/5.56 was designed to be fired out of a 20 inch barrel. Shorter the barrel less effect the round becomes. The round depends on the high velocity to be effective. There is a huge reason 300 BLK is replacing the 5.56 for SBR's ar15s

[@Rob_Nasty]

2 thumbs up

[@K1ngDre-DMZ]

What twist rate would you recommend on an 18" AR15 Barrel??

[@shoxroxice]

So much awesome info, context, and perspective. Need Part II before I finish my coffee. Thanks, Berz.

[@CaptainBerz]

shox rox ice People on average cannot handle a long video, haha. Part II to be out Tuesday and be another 7-8 minutes.

[@dylanm4733]

Great Content Guys!! Definitely Following This Channel!

[@carlc4098]

Now is this same goes for 308?

[@SergeiSimonov1945]

Very informative - and another reason 300 blackout rocks

[@anselmoalliegro460]

Another thing you may not know is that the flash hider on most NATO rifles was exactly 22 millimeters in diameter for the purpose of firing rifle grenades. Perhaps all of the other commercial "flash" hidders are just for looks. Of course today we use the 40mm attachments or M79s. The other thing you may not know is that short barrels sound like the enemys' rifles (FAL or AKMs) and, particularly at night, this may draw friendly fire.

[@apex831]

Best explained vid I seen in barrel length, vs velocity.subbed👊👍

[@dirtpile]

learned something today - thanks!

[@CaptainBerz]

Right on!

[@Whatisright]

I read somewhere that a shorter stiffer barrel is better than a longer barrel.

[@husky701rider9]

What's the handguard on the 18 inch build?

[@CaptainBerz]

Ian Jacob AM-TAC 15" Keymod....

[@justaregularguy3827]

usually a 16in is pushing nato 62 gr at 2900 to 2970

[@allenledbetter7275]

That has to be one of the best beards i have seen in a while.

[@dmbnorthphilly]

hi you doing, I'm new to ar building was wondering what would suit best for my needs I'm looking into getting a 18" barrel and setting it up for 100 - 200 yards, what twist rate would be best at that distance ? thanks man any information would be helpful.

[@dmbnorthphilly]

also I'm looking into 1/7 or 1/8 twist on this build

[@superdome65]

+dmbnorthphilly depends on the ammo. find a brand you like, call customer service and ask what they suggest for optimal twist rate for the BC

[@crapcofailtury704]

so the m855 only tumbles and fragment in a 20in barrel?

[@GeorgiaBoy1961]

The official data state that a MV of 2500 fps or above is preferred for optimal fragmentation,i.e., yaw giving way to tumbling (swapping ends) in the terminal ballistics phase. Part of the trade-off of M855 was that in order to get better penetration against sheet metal (an enemy helmet, it was hypothesized) at the specified range, a steel cup or "penetrator" was inserted into the lead matrix of the bullet. This does not make it AP or armoring piercing ammunition; technically, it is enhanced penetration ball/fmj ammo. The penetrator tends to diminish the reliability of the yawing effect so pronounced in the 55-grain M193 round. Sometimes, M855 62-grain green-tip yaws and fragments just fine, without issue. Other times, if begins doing so only after passing through a certain thickness of tissue first (which is why the round is thought to be less-effective against slender or skinny people), and sometimes it just ice-picks and doesn't yaw-fragment at all. Like most conventional rifle bullets, the M855 62-grain projectile is naturally tail-heavy. It's center of gravity lies aft of its center-line. When it is fired, the tremendous spin and muzzle velocity imparted cause it to remain in the proper nose-first attitude and spin-stabilized along its long axis. Because of imperfections in construction, all M855 bullets yaw about their central axis to a degree. The question becomes is the yaw enough to cause the bullet to tumble (swap-ends) when it hits a target such as an enemy soldier? The unpredictability of the degree of yaw, plus the dependence upon the projectile designs - M193 and M855 both - upon high MV for their effects on target - account for much of the inconsistency in combat performance of the 5.56x45 cartridge. Some troops reporting devastating first-shot stops, others reporting enemy tangos absorbing multiple center-mass hits yet remaining in the fight. Modern innovations such as the widespread use of bonded solids and OTM (open-tip match) bullet designs have led to greater reliability and terminal effectiveness for the cartridge out of carbines, SBRs and when suppressed, as well as more-reliable performance against barriers such as automotive glass and sheet metal.

[@raidersJScamo]

What buffer do you recommend on a 18" and 20" barrel?

[@Gunker02]

JSCamouflage carbine and H buffer worked for me on both barrel lengths.

[@heinrichvonkekelnazi393]

20" barrel, 1:7 twist, 62gr 5.56. No other choice for me.

[@survival2324]

So AR20” 1:7 twist is it good?

[@CaptainBerz]

Firearms are only as good as the owner at accuracy

[@matthewbeaver5026]

Went 20" on my 6.5G for extended range hunting But do agree short barrels have their purpose Also have 16" 5.56 & 10.5" x39

[@chriscollinsworth4727]

What about other caliber's ???? My 6.8 has a 20" barrel and that's my barrel length. Do other cartridges too .

[@28ebdh3udnav]

I want a retro AR15. I want my first AR15 to look like an m16. Fixed stock. Carrying handle. 20 Round Mags. Iron sights. Almost like the one that my father used in Vietnam.

[@lovelygrey]

I think the barrel length is subject to the environment in which you live. If you live in an urban environment then a 16" barrel is what you need, but if you live in a wilderness habitat then perhaps a 20" barrel would be more practical.

[@unapologetic7900]

What is that Barrel in Nate's Rifle? (Brand, Model)

[@CaptainBerz]

18"

[@unapologetic7900]

@@CaptainBerz I mean what Brand, Manufacturer.

[@CaptainBerz]

Nordic components. Should be link.

[@IrishPennant0311]

Muir knows his stuff

[@CaptainBerz]

AlphaHotel0311 He sure does, and I like to get the best information out to my viewers, not talk about stuff I am not fully versed in like some KZbin channels do. I do not know everything and have no problem saying so when that is. I have a good understanding of this subject but Murr really has put the time in, studied it, lived it, and taught it, etc. ;)

[@kirbymoffatt9610]

16in bbl 1/9 twist

[@Gruuvin1]

Mmmmkayy. Twist rate wasn't discussed. Looking for part 2 just to see if I just wasted my time

[@sniperbait1]

does having a free floating handguard make that much of a difference in accuracy?

[@CaptainBerz]

sniperbait1 The majority of the accuracy of a gun lies in the operator of it.

[@airgunwarriors7491]

Gentlemen, I'd watch the whole video if my internet was not sooo slow right now, I keep getting the spinning circle while it tries to play your video, ugggh! I have a question and if you covered it in the video, I apologize for asking, but I would like to know once and for all if barrel twist rate has any impact at all on velocity/fps? Hopefully I can catch the test of this video later, as well as Part II. Thanks, AGW.

[@damiion666]

They're talking about real AR's, not airsoft crap dude

[@airgunwarriors7491]

+BJJ Fiend Thank you, as you are correct. Last I checked, people shoot more than just one type of gun/s. Happy Shooting, AGW.

[@jukeboxhero1649]

7.62 x51 is coming back because it can shoot weak small loads or 1000 yard heavy loads with ELD rounds that perform like 300 WM

[@Firemedic4177]

does anyone know what muzzle device the rifle on the right has?

[@PrairieDoggin2024]

Idk what it is but I've seen it on the armalite ar10

[@justlcb]

It is the same as on my Armalite M15TAC18. I called tech support to find out. It is the highly rated OSS Bannar Alpha I. It is 1/2 flash suppressor and 1/2 compensator. It swirls the gases around rather have having them eject straight out the sides. (Person shooting beside ya will be loving you!) Since came on rifle, sorry, don't know price. Hope this helps. I get more compliments on how mine looks. Seems my gun is quieter and felt recoil is so minimal.

[@jakehansen3418]

My goto is an 18 inch 1:8 twist in .556 my reasoning is I like the full length gas system and .556 was designed for a 20 inch barrel as we all know so anything lower you're losing that velocity at range. With that being said I've owned a 10.5 inch .556 and a 12 inch .556 AR when I go target shooting the 10.5 hits out about 200 torso sized groups the 12 about out to 250. Now when hog hunting anything above 100.yards they have problems taking them down that's because even though on the range they might look like they can hit out hard at 200 yards plus but in reality .556 needs a vertain velocityto work.

[@jakehansen3418]

If not you're basicly hitting with a beefy .22 lr if you want a short barrel ar go with 300 black out or 6.5 creadmor or whatever is out there at the moment I mean we are no longer bound by .556 lol.