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Posted: 5/28/2001 10:06:05 PM EDT
Can anyone advise the thread size for the end of the AR-15 barrel? I want to have a muzzle break manufactured. Thanks
Link Posted: 5/28/2001 10:25:08 PM EDT
Standard thread size is 1/2x28 NEF (half-inch diameter, 28 threads per inch, National Extra Fine pitch) class 3a. I'm not sure of the length, I think it's 1/2 inch also. Try KurtsKustom in the Industry Forum. Happy hunting, havoc
Link Posted: 5/28/2001 11:40:29 PM EDT
A clarification here: You can't thread an unthreaded barrel UNLESS the threads won't mate to ANY flash suppressor. Then, if it's threaded, I THINK the accessory must be permanently mounted -- pinned, staked, or soldered. Bushmaster makes two brakes for post-ban guns. They pin in place and need installation. Bushmaster will install them for you. The BATF can't tell you the difference between a "suppressor" and a "brake." Like "pornography" . . . "They know it when they see it." A brake can be a fairly sophisticated design issue. Lots of after market options available.
Link Posted: 5/28/2001 11:47:20 PM EDT
Thank you for the info, but the rules are a little different here in Canada. I can thread the barrell, as the rifle is classified a handgun here, and as such is a restricted weapon. It came with a threaded barrel, however I just want to shorten it, and have a new brake made.
Originally Posted By PowderBurns: A clarification here: You can't thread an unthreaded barrel UNLESS the threads won't mate to ANY flash suppressor. Then, if it's threaded, I THINK the accessory must be permanently mounted -- pinned, staked, or soldered. Bushmaster makes two brakes for post-ban guns. They pin in place and need installation. Bushmaster will install them for you. The BATF can't tell you the difference between a "suppressor" and a "brake." Like "pornography" . . . "They know it when they see it." A brake can be a fairly sophisticated design issue. Lots of after market options available.
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