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Durkin Tactical Franklin Armory
User Panel

Posted: 1/21/2001 11:45:13 AM EDT
If anyone owns a Bushmaster M4 barrelled upper, could you please measure the outside diameter of your barrel near the muzzle end (is it heavy or standard?) please measure with a caliper if you can.  I need the measurements for a custom AR brake that I'm having made.


Link Posted: 1/21/2001 4:34:50 PM EDT
Mine started life as a preban(perm attached Wilson brake, milled bayo lug) and measures .698" at the muzzle. About .650" back from the muzzle threads it steps up to .745". Hope this helps.
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