AR Sponsor
Posted: 5/2/2011 5:23:53 PM EDT
|
i have 3 ARs, and they were all complete rifles when i got them. with my first tax stamp, rather than cutting down my 14.5", i elected to just buy a new upper. i also got an AAC 51T brakeout with anticipation of my 2nd tax stamp. i read that its common practice to have the barrel re-threaded before a suppressor mount is installed, to ensure that the threads are concentric to the bore and not to the barrel diameter. my new upper is a BCM hammer forged barrel upper. i posed this question to BCM va email, and the reply was that all BCM barrels are to USGI spec. while i cant say this is invalid answer, it might not have been the answer to my exact question (ie... is he saying that all USGI barrels are threaded to exacting specifications to accept suppressors without risk of baffle strikes?).
so: should i re-thread a BCM hammer forged 1/7 barrel before mounting the AAC brake? or is "USGI spec" correct and trusted enough that i should just mount it with confidence? oh, and before: 
and after: 
|
|
I don't think anyone can tell you without physically checking your particular barrel. For my first SBR upper, I had a 16" cut down to 10.5" with the gas port opened by JP Grips. It runs great suppressed or unsuppressed. I was a bit nervous when I first put on the flash hider, but I eyeballed it, said a quick prayer, and did a one round in the magazine test fire. It worked just fine. It also runs great with Silver Bear and WPA ammo, suppressed and unsuppressed.
If you want to hedge your bets, as well as give you more options, look for a .30 cal suppressor and have it run double duty on your 5.56mm rifle. There's a larger exit to be safe, and the larger volume will help compensate. It will weigh a little more, but it gives you more versatility. Edited for spelling. |
AR Sponsor