The Rock River Arms RRage Carbine provides a highly accurate, reliable, and durable rifle platform with exceptional performance. It comes chambered in 5.56 NATO with a 16 inch barrel. Features include an adjustable stock, an M-LOK handguard, an optics ready flat-top, and a 30 round magazine. - CALIBER .223 REM/5.56MM NATO - MAGAZINE (1) with 30rd capacity - BARREL 16-INCH CHROME MOLY, A2 FLASH HIDER / 1/2-28 THREAD - RECEIVERS UPPER EXTRUDED ALUMINUM A4 WITH PORT DOOR/NO FORWARD ASSIST - LOWER FORGED RRA LAR-15M - HANDGUARD 9.5 INCH RRAGE 2G FREE FLOAT RAIL HANDGUARD, M-LOK(R) COMPATIBLE - TRIGGER RRA SINGLE STAGE TRIGGER - STOCK RRA SIX-POSITION TACTICAL CAR STOCK