X-Caliber - AR 9mm BarrelExplore further
AddThis. AR 9mm Barrel 1:10 Twist 6 Groove with 1/2'x28 or 5/8'x24 muzzle threads. Please Note: *AR 9mm's (AR9) require special buffers, BCG's, 9mm designated lowers and Mil Spec or AR 9mm specific Triggers. **These barrels will fit and work with any standard AR15 upper, provided the correct bolt and springs used are for the AR9 blowback ...
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