Calibers: 223/5.56mm NATO, 9mm. Barrels: 7”, 10.5”. Wilson chromemoly, 1:9 twist, A2 flash hider, 1/2x28 thread. Weights: 5.1 lbs. (7” barrel), 5.5 lbs. (10.5” barrel). Length: 23” overall. Stock: Hogue rubber grip. Sights: A2 front. Features: Forged A2 or A4 upper, single-stage trigger, aluminum free-float tube, one magazine.