High Standard Ar-15/M16 300 Blk Barrel

We
Made from 4140 M4 Barrel extension with M4 feed ramps Parkerized 1/8 Twist Medium Contour 5/8-24 Threaded muzzle Carbine Length Gas System Mfg: High Standard
We
Made from 4140 M4 Barrel extension with M4 feed ramps Parkerized 1/8 Twist Medium Contour 5/8-24 Threaded muzzle Carbine Length Gas System Mfg: High Standard