How Long Should Your Inner Barrel Be? | Airsoft Tech Talk Q&A | Episode 20

[@ErtiaAirsoft]

inner barrel part at 2:08

[@Romanpetrina-sh9cy]

Legend

[@GladlyKillmore]

Hey thanks for responding to my question! I appreciate the input, and the videos you make. Very inspiring, and a maximum fps build would be an awesome show gun to exercise tech skills! Thanks again!

[@ih8Joos]

currently rocking a 1240mm zirconium diamond inner barrel 5.96 diameter with a 96k RPM all platinum gearbox and a spring I custom fit that I got off of a 18 wheeler. I get around 45000 fps with .32 gram BBs give or take. Decent accuracy at 250 meters.

[@thomasvandenbergh2660]

in theory if you have a perfect system (perfect pressure seal, no friction...) you would be able to get the same joule output from the gun as the energy stored in the spring when it is fully compressed if you are using a perfectly fitting barrel that has the same volume of air as your cylinder. but since we don't live in a perfect world we can calculate how efficient your system is by measuring joule output and the joules of the spring and then use that to get an idea how much output you could get from the gun with a certain spring. The single factor that we have left is the strength of the components. take that away and in theory an aeg can have a theoretical infinite amount of joule output. so yeah its all dependant on efficiency and structural resistance

[@Tomasmoravia]

Good ratio is around 1,5 to 2,5 of cylinder to barrel volume. Heavier BBs tend to need lower ratio to shoot accurately. It is about accuracy at the end. One to one ratio is just not enough to stabilize BB properly.

[@Bagoly_1]

@@Tomasmoravia so u say if i go whit 0.36 . 1.7 :1 ratio (what I have ) will be more accurate than 2.3:1 ( what I could achieve ) ?

[@papercrowe8772]

I feel like a great paint job can actually add to the value of a rifle as long as it’s not too crazy.

[@DatEcuaRicanDude]

A professional paint job yes! Cerekote paint then yeah!! But a hydro dip or even spray painted one? Nope that will hurt the price for sure

[@shockwave.9749]

@@DatEcuaRicanDude yea, if I went to buy a gun with chipping paint and stuff all over it'd need a discount lol

[@FlankerJackChannel]

I'm confused. You would buy your airsoft gun and then paint it in the hopes of reselling it or trying to resell one that's already been painted?

[@FlankerJackChannel]

@@DatEcuaRicanDude cerakote on an airsoft gun would cost more than the gun itself

[@DatEcuaRicanDude]

@@FlankerJackChannel i agree with you!! Can never get what you fully payed for if ya tryna sell it!

[@jessecoyle1109]

Oh MY GOD THANK YOU BRO!!!!!! Right people think that by painting it some cool colors, it INCREASES the worth of their gun and i TOTALLY agree with you on there bud!!!

[@williamhammond3998]

I love painting my guns lol. I can tell it gives me a significant edge out in the woods.

[@mikemegadeth4110]

7:50 BLAZE IT! MY MAAAAN!!! 😎

[@sethhall9614]

We had one guy who used to play who was our local tech wizard. He had a 4.5inch bolt gun, idk if it was an aps2 or vsr10, that could ring a frying pan at 250 feet every time. I cant say much as to what was done to it as I didn't build it, but I do know it shot above 2 joules.

[@1tonneairsoft935]

I made a full auto AEG that shoots 0.48gm bb's at 3.3 joules. So, it is rocking. There is a lot of fiddling that was needed and it needed 32:1 gears SR25 (home made) but it is very accurate and long range. Rate of fire is not fast. Probably about 14RPS. But still, I do not know of anyone else who has done this. NOTE: It is easier to get high energy rates with lighter bb's but they will not travel as far as the heavier bb. So, my goal was to make it have a heavy weight bb at a high energy rate. The gun has lasted for about 3 years and I have had to replace the gears once and a new piston once. The spring is also a home made spring. So, more powerful than anything on the market.

[@darkshock42mlg05]

mine is still reverse creeping on a 407mm inner barrel with a .4 vs a .3 and yes the gearbox is perfectly sealed off as in you can't push the piston forward with the nozzle forward with your thumb over it. im shooting for 1.88j

[@1tonneairsoft935]

@@darkshock42mlg05 You may need to add weight to your piston and also increase the spring size.

[@upurhoe12321kevin]

Started teching from your videos. Appreciate all you do!

[@ytmadmatt]

Thanks for answering! Honestly the best news I could have gotten and knowledge that I definitely didn't have!

[@Mark_B544]

In the uk, anything over 2.5joukes is a firearm and incurs jail time

[@anomalyp8584]

So the inner barrel should match the Joule output and the weight of the BB...great, but that doesn't help at all. What length matches up with wich joule output/weight of BB...weight of piston,...

[@griffanspanner]

Hey all, I own a Paintball barrel brand and am currently representing a new HPA rifle company. My pb brand is in charge of the design and production of a new high-end inner barrel for the gun and the minimum order needed for barrels far exceeds what we need for the first couple of runs. Other than 150mm, what barrel lengths do you use and on what gun? I have to cut thousands of extra units to sell and want to see which lengths are most commonly used. Thanks.

[@pauls.5815]

I have a DSG 14:1 SP150 SHS piston that has no AOE and no glue on the piston rack. I'm well over 20K cycles. There is no glue on the planet that will bond to both metal and nylon. If someone tells you otherwise, they don't understand how glue works on a molecular level. When gluing nylon to metal, they use a plastic bond glue that sticks to nylon, and then a metal bonding glue will actually stick to the plastic glue. There is no room in the piston to use two glues. I have built many many AEGs never put a drop of glue on a piston rack. Never had a piston rack come out. What stock gun has a rack glued? none of them. Not needed because it is pointless.

[@michaelgriffin1205]

I did just that with HPA..6.03mm SS precision 650mm inner and few more mods got me 5J appx 850FPS.. only in testing the build.. i stepped it down to 600FPS area..

[@JediMando11]

Thanks for the tips! Nice shirt btw

[@nicholasjohnson172]

the default awnswe is tehe same as your outer but thats only for a regular gun. maybe you intend to go no higher than a .3. otherwise, you want shorter

[@darkshock42mlg05]

the default is the same legth as yoiur outer barrel however thats for a regular gun where you don't intend to go higher than a .3. in the case of a dmr, you want to hop at least a .36. ideally a .4. in the case of a sr25 or svd/svu you want to hop a .4-.45 since you have the extra volume. hoerver doesnt matter if its a m14 gw3, scar 20, or even a sr25 or svd/svu the barrel is far too long. of course if you are using hpa dont worry about your barrel length. also if I'm getting a svd that's a 100%hpa with a p* f2. its a horrible design. ou also need a full cylinder. that's not negotiable.

[@s98958]

Could you try building the strongest AEG possible? Using a weighted Piston (diy machined Bore-up stainless piston head + 3/8" spacers) and MS210 spring, my 330mm tightbore P90 puts out >4.5J (~500 fps with .40g, I don't have heavier bbs to test). Properly radiused V6 shell holds up fine as well 5K rounds in. I believe you could get an M4 platform (with STS) to get over that, but a Max power SR25/L85 would be really satisfying to see, especially a ported extended cylinder coupled with a short tightbore barrel for optimal piston acceleration/pressure spike. would be awesome to see an AEG's potential 👍

[@BrandonBrownOctaneOverdrive]

I definitely disagree with your stance on painting guns. Every time I've taken a gun apart and gotten super ocd with my paint job, it ends up weak and doesn't look as good. Taping off what you don't want to paint, wipe down with alcohol, then go straight to your colors. Every time I've done this method, it comes out better, and I have painted all of my guns. Love the videos though, it would be cool to see you do the high FPS build.

[@randywatson8347]

I always imagine the bb being in a spin after it hits the hopup, but wonder if engineers thought about the effect hitting the smooth 6.03 mm bore. For sniper I'm going to test with elevation adjustable picatiny rail for my scope, basicaly to get more distance. You canbuy that type of rail from gel blaster webshops for 25 buks.

[@MyFaux]

DSG should be around 180-220mm inner. 400mm is for full stroke.

[@giuseppeoloresisimo6609]

If I close my eyes, I can hear Travis Haley speaking to me about airsoft.

[@FlankerJackChannel]

He did once

[@leonardoballes7473]

Thanks for the input!

[@RuffsTV]

There did used to be a video on KZbin of an AEG firing 0.2g bb's faster than the speed of sound. Made a hell of a crack.

[@ThOoMii013]

For your next q&a. I have a question or actually two. How do you choose what type of motor (torque or speed) in combination with what set of gears (ratio). Im my case im looking for a instant trigger response. Not so mutch an insane speed build. Rof between 25-30. What should I look out for. Its for my partly stock hk416D. (It is equipped with an perun v2 hybrid and Prometheus barrel, maxx hopup chamber and I play with a 11.1v lipo) But the stock motor is just to weak. Not crisp enough. I hope you can / want to answer my question in detail. Thanks and greetings from the Netherlands

[@Skivideoproductions]

Miss the King Arms Blazer! Lol. Know someone who used to use it and lend it out. That was a fun gun and was very precise with a barrel upgrade. 👍

[@0Harriz0]

Couldn't watch your last video bacause of age restriction. Thanks European Union. That's exactly what I wanted

[@tommo9757]

Try using a VPN and connect to a non-EU country

[@willspencer8694]

EU is just scum

[@TheAirsoftTech]

EU is lame. Like others suggested, use a VPN. 😀

[@jeremysanders8138]

Could you not incorporate a design for the most powerful airsoft gun to push passed the 450 mm barrel length limit? To say a 600nor 700 mm barrel. The barrel length reducing the ridiculous f fps but taking advantage of the benefits of a longer barrel (longer range, good cluster).

[@TheAusherGuy]

Hope you can answer this question. In comments is fine. My set up is a zci 300mm/6.02 barrel, r hopped, 3/4 cylinder, I want good range and accuracy. What spring and bb weight for best results?' I have a 130 spring in it now and shooting .28 BBs, but the range isn't great. Maybe 50-75 feet until the bb starts to dive down quick.

[@V7I-theseventhsector]

why are V2 gearboxes so much more popular then other gearboxes? i only started tecking 2 years a go but between V2 and V3 I prefer V3 because the trigger on the V2 always pops out when trying to close it back up and the inner wire system can be hell if the motor pushes the wires at any point while inserting the motor as it can destroy the wire. . . can you make a video as to why the V2 is so much more popular and preferred?

[@BluboxBattleSquad]

Hello there ! I've seen the barrel length question : Do you think the same with an hpa setup ? What max length would you recommand for a build to have the best range at 1J (better), and could up to 1.2J max ? How much range could it reach ? Thanks !

[@papercrowe8772]

Also, would you be able to do a video on polishing your inner barrel?

[@reflexairsoft4648]

Its very easy, check out one of my Old vids 👍

[@PuhaKeksz]

Hi! I run a fully upgraded V2! Before i installed the Aster,everything just runs fine,but with the Aster my motor gets really hot! I tried re-shimming,re-lubricate,adjust or turn off the active break in Gate Controll,etc.,but it seems nothing helps!

[@TheAirsoftTech]

Check your active braking requirement

[@PuhaKeksz]

@@TheAirsoftTech i have a theory,what if my motor is “overpowered” in my build with the aster? There is a 18:1 with M120 inside,and i use a infinite torque motor,can it be an issue? (I know i should try with an another motor,but i only have this one in the gun)

[@bcas]

Please explain: why do you use a r-hop-bucking with 0,20gr BBs? Is a r-hop-bucking not only for heavier BBs?

[@bryceowens5220]

he said he runs .28 in it, he was only talking abt .2 when he was talking abt his fps output

[@KentuckyFriedKiwi]

Did u end up making a strongest fps output strictly aeg build 💪 🤔

[@RCONAIRSOFT]

Hey I hope youre reading this. I want to upgrade a PP-19 with a Inferno Gen 2 HPA Engine. The PP-19 is a bit shorter than other M4 or AK Models more like a AKS and has a inner barrel length of 255mm. Is that too short? I want to run it at 1,8-,1,9 Joules with 0.3-0.32g and would like to be able to play at longer range outdoor fields?

[@Terminatorbart]

Good info!

[@themanthelegend7048]

You want your cylinder volume to be more then your barrel volume.

[@yrnisoblack466]

Can a airsoth function without a inner barrel

[@AaronGawin]

Hi there mate can u give me some options if what’s the length uses inner barrel if I’m using my outter barrel length for 13’5 I’m new with this Airsoft world so if u can give me a length inner barrel that would be super super appreciate because I don’t wanna order a long inner barrel that I need to cut a lot and just waste my money thanks Looking forward hearing from you 😊

[@robinderoos1166]

Yeah my mp5k gets only 0.75 joule out of a half cylinder with a 113mm barrel. I couldn't find the correct nozzle though, so i guess the G3 nozzle is 0.2 mm too short. Still gotta try a different bucking though

[@jeffcarr2265]

Thankyou

[@notimpressedbyyourm4932]

420 blaze it🙌🙌

[@lincolnmills6983]

What inner barrel do you recommend for an Hk416 or m4 type airsoft gun

[@Bagoly_1]

4:48 " appropriate joule setup to match your barrel setup" can u explain this? how can I find out this?

[@SweetyetS0ur]

Thanks 😁

[@jonatanschmidt7844]

I would love to see a high powered fps aeg

[@M16A1srawesome]

What are your thoughts on the "parallel" motors I see people like commander Cole making. Like the 20x2 TPA etc.?

[@Daequitas]

hey there great video... i am currently running > G&P Colt M4 AEG @415 fps (w/ 0.20g) w/0.28g powered by 7.4 lipo, 28cm factory barrel and hopup i wanna upgrade the barrel and hopup.. i think of getting a MAXX PRO for a hopup but have no idea on the barrel (brass/steel/caron steel etc??) and boresize (i might go 6.03) and required hopup rubber and style > KWA Kriss Vector GBB again with factory standard length barrel i wanna lenghten my barrel so could you (and/or you guys reading the comments) please give me some ideas and good alternative choices for these guns??? thnx very much appreciate your time and effort :D cheers

[@patrickmuller5223]

So joulcrepe comes from to less air?

[@bharrisnicholas]

I'm new to the world of airsoft. I bought a entry level elite force m4. I want to get a percision inner barrel but don't know length or if I buy a barrel will it attach with no issues. Is everything universal?

[@christophermiller925]

Great videos. Very informative 👌🏼 420 Blaze It 👌🏼

[@MRrailaway]

Now i wonder if you can have a barrel that is too long, he said 450mm is the max usefull length but my stock barrel is 495mm long (for reference im trying to build a dmr (national limit 1.7 joule))

[@rdb9936]

How did this work out in the end? I’m thinking of doing a long barrel HPA sniper build

[@Spetsnazty]

rattle can everything.

[@jacobnes5083]

Could you show us how to polish our barrels?

[@reflexairsoft4648]

Check out a vid on this on my channel 👍

[@xAUSTIN316x]

How do I contact you for tech service 🤔

[@roycsw1000]

If it breaks. Turn it down. That's how i do it.

[@venusairsoft6783]

Blaze it

[@RIAG-g6z]

Heh. I made a 30mm barrel.

[@Klaudett]

363 or 500.

[@reflexairsoft4648]

What theory of bb stabilization in the barrel are you a believer of? Down top or in the middle?

[@papercrowe8772]

I used to be top, but then I read through someone’s experiment where they ran a bunch of simulations and it turns out the pressure around the bbs is greater than the force from backspin. So I’m pretty sure it wobbles in the middle of the barrel on the way out.

[@reflexairsoft4648]

@@papercrowe8772 im a middel guy aswell, so I made a vid about it 👍

[@dmoose7066]

following

[@M16A1srawesome]

I think hs5's test is pretty conclusive unless you don't trust him, and in that case one should replicate his exact test before drawing a conclusion.

[@reflexairsoft4648]

@@M16A1srawesome whatfor5 deleted all his vids on the subject, i dont know why, maybe because they where very bias dont know. But funny you mention it, I made just such a video, and I have had clear barrels made aswell to reproduce what science dictate. When doing tests like this, they are concluesive only if the test Can be repeated by anyone, and i tried repeating his test, with nothing close to his concluesion

[@patrickmuller5223]

So joulcrepe comes from to less air?