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Old February 6, 2013, 09:36 PM   #7
AR15barrels
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Join Date: August 23, 2006
Location: Los Angeles, CA
Posts: 53
Almost all of the suppressor makers have published thread specs that call out a clearance cut behind the thread tendon so that you end up with a nice square shoulder to seat Thea direct mount can against.
on the cans that use a mount on the barrel, the mount will generally come with shims and rocksett.
The better muzzle devices and cans will have a counterbore in the threads to account for the lack of threads on typical factory barrels such as your bravo company barrel.

When I thread barrels, I have a nice clearance cut behind the thread tennon.

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