Climbhard Posted August 3, 2016 Share Posted August 3, 2016 So i want to build 9mm upper for my SBR lower. Quetion is what barrel length. Id like to have about a 5" barrel with my ti-tant can under a 9" handguard. Ths would be the "fun" configuration. But i realize I cant run it surpressed in PCC so what can I thread on the barrel to get the gasses out past by handguard if the barrel is 3.5" or so shorter? Is there any reason i cant envision why id want a longer barrel say 8" on a seven inche handguard for PCC. Bummer is then with the can I'm 14.5" 15" long which negates the "fun" facror plus the can doesnt look as good sticking out there by itself. Link to comment Share on other sites More sharing options...
DocMedic Posted August 3, 2016 Share Posted August 3, 2016 (edited) You can either gut the can and turn it into a "barrel shroud" when you are shooting USPSA, or you can have someone build you a barrel shroud so it will extend past the hand-guard. You probably can get a shroud made for pretty cheap. I've seen them as cheap as 60 bucks http://www.kineti-tech.com/create-your-own-barrel-shroud-9mm-ar-15-style-rifles/ Edited August 3, 2016 by DocMedic Link to comment Share on other sites More sharing options...
thermobollocks Posted August 3, 2016 Share Posted August 3, 2016 The longer barrel helps you make major. Link to comment Share on other sites More sharing options...
Stlhead Posted August 3, 2016 Share Posted August 3, 2016 JP sent a barrel extension with my SBR, never actually used it. The prohibition of suppressors from USPSA is stupid. After 8 or 9 inches, the extra barrel actually reduces velocity with most common pistol powders. Link to comment Share on other sites More sharing options...
Climbhard Posted August 3, 2016 Author Share Posted August 3, 2016 Found this. Look like what i need http://model1sales.com/index.cfm?fuseaction=category.display&category_id=406 Link to comment Share on other sites More sharing options...
Climbhard Posted August 3, 2016 Author Share Posted August 3, 2016 The longer barrel helps you make major. All scoring is minor. Link to comment Share on other sites More sharing options...
heaman Posted August 3, 2016 Share Posted August 3, 2016 I'm following this thread since I've had the exact same question lately. #8 from the link above looks like a reasonable solution. Link to comment Share on other sites More sharing options...
Climbhard Posted August 3, 2016 Author Share Posted August 3, 2016 I'm following this thread since I've had the exact same question lately. #8 from the link above looks like a reasonable solution. That's what I'm thinking Link to comment Share on other sites More sharing options...
MarkCO Posted August 3, 2016 Share Posted August 3, 2016 I just built two uppers. One a 16" barrel with a pistol comp on the end (for competition), the other a 8.5" barrel that is at the gunsmith and will be an integrally suppressed barrel for other things. Link to comment Share on other sites More sharing options...
bwikel Posted August 3, 2016 Share Posted August 3, 2016 My PCC is a 7" barrel with a 9.5" rail. I have it set up for a suppressor to fit inside my rail but when I'm not running suppressed I have the same issue, I need a way to get the gas out the end of the rail. I am running a KAK flash can that is threaded 1/2x36. It adds some weight to the end of the gun so a little help with muzzle rise. https://www.kakindustry.com/ar-15-parts/upper-parts/barrels/9mm/kak-industry-flash-can-9mm Link to comment Share on other sites More sharing options...
Hanchey Posted August 3, 2016 Share Posted August 3, 2016 Damn I was going to do the same thing but pin my can as I have no use for this can as it just sits in my safe. So u cant run supressed in PCC?? Thats a stupid rule. Sent from my SM-G920P using Tapatalk Link to comment Share on other sites More sharing options...
MarkCO Posted August 3, 2016 Share Posted August 3, 2016 Damn I was going to do the same thing but pin my can as I have no use for this can as it just sits in my safe. So u cant run supressed in PCC?? Thats a stupid rule. Sent from my SM-G920P using Tapatalk Agree it is not a rule I like. But I think it is in response to the naysayers who think all the suppressed AR9s are not able to be picked up on the shot timers. An extra upper, rail and barrel for the second upper was only $300, so it was not a huge deal. Link to comment Share on other sites More sharing options...
Climbhard Posted August 3, 2016 Author Share Posted August 3, 2016 My PCC is a 7" barrel with a 9.5" rail. I have it set up for a suppressor to fit inside my rail but when I'm not running suppressed I have the same issue, I need a way to get the gas out the end of the rail. I am running a KAK flash can that is threaded 1/2x36. It adds some weight to the end of the gun so a little help with muzzle rise. https://www.kakindustry.com/ar-15-parts/upper-parts/barrels/9mm/kak-industry-flash-can-9mm Saw that one but I'd need 7" of barrel to clear a 9" rail. I think I'm going with that 5 1/2" flash hider I posted on a 5" barrel with 9" handguard. Link to comment Share on other sites More sharing options...
Climbhard Posted August 3, 2016 Author Share Posted August 3, 2016 I wonder if all that gas swirling around in a 5 1/2" flash hider will affect accuracy? Link to comment Share on other sites More sharing options...
StealthyBlagga Posted August 3, 2016 Share Posted August 3, 2016 ...So u cant run supressed in PCC?? Thats a stupid rule. Agree it is not a rule I like. But I think it is in response to the naysayers who think all the suppressed AR9s are not able to be picked up on the shot timers. ... In general I agree that having the fewest possible restrictions on PCC configuration would be preferable. Unfortunately, my experience is that the timer can struggle to pick up the shots from even an unsuppressed 16" 9mm PCC, especially when the muzzle is projecting through a port. The RO can only get so close, and the ejection port is not always accessible without getting in the shooters way. Adjusting the timer sensitivity is not always an option either. IMHO a suppressor on a PCC is a recipe for a high percentage of reshoots, which nobody wants. Hopefully someone will be able to generate data and protocols that will allow suppressors in the future, but with all the other teething issues we still have to work out with PCC, I would prefer suppressors stay off the table at least for the time being. Link to comment Share on other sites More sharing options...
Nathanb Posted August 3, 2016 Share Posted August 3, 2016 I know my mpx does not register on my timer at all. The only round that gets picked up is the very first one because of first round pop. I've tried it during a side match. Good news I was the fastest time though. Lol Link to comment Share on other sites More sharing options...
rhowell309 Posted August 3, 2016 Share Posted August 3, 2016 I have a MPX that is 4.7" with a 3-Lug mount. I'm waiting on an Omega 9K to get out of jail and a Form 1 to make it a SBR. I've sent a 2nd 3-lug Silencerco adapter to a machinist to fit a piece of aluminum tubing. I'll plan on useing this as a muzzle device for USPSA. I don't think I'll have any issues with the timer and the Omega 9K in most other events I'll use it. I'm going to do a similar exercise with a JP 9MM SBR. Link to comment Share on other sites More sharing options...
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