The M-15(TM) BAT15 was designed with the consumer in mind. Well suited for duty, sport, or defense this dependable workhorse weighs in at 6.3lbs. The forged flat-top receiver, MIL-STD 1913 rail as well as the featured gas block with a MIL-STD 1913 rail make it a breeze to easily attach accessories. - CALIBER .223 REM/ 5.56MM NATO - MAGAZINE (1) 30rd PMAG - BARREL 16", 1:7 Twist, A2 Flash Hider - HANDGUARD B5 Polymer KeyMod - RECEIVERS 7075-T6 Aluminum - TRIGGER Mil-Spec - STOCK B5 Collapsible