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9/22/2017 12:11:25 AM
Posted: 9/18/2003 9:12:42 AM EDT
Hey guys!

What's the muzzle thread pattern on RRA's pre-ban style 9mm uppers? IIRC, the 9mm Colt SMGs use 1/2x36... did RRA copy that aspect of the Colt system, or do they use the more common 1/2x28?

TIA.



Link Posted: 9/18/2003 2:39:34 PM EDT
1/2-36
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