CALIBER 5.56 NATO - BARREL LENGTH 16 in (292 mm) - MAGS INCLUDED (1) 10rd Polymer Mag - MAG TYPE AR-15 - STATE COMPLIANT CA - ACTION TYPE Semi-Auto - STOCK TYPE Fixed - BARREL MATERIAL Stainless Steel - TRIGGER TYPE SIG Enhanced - TWIST RATE 1:8 - FOREND TYPE Alloy - GRIP TYPE Polymer - RECEIVER FINISH Hard Coat Anodized - OVERALL LENGTH 30.8 in (782 mm) - OVERALL WIDTH 2.5 in (64 mm) - HEIGHT 7.5 in (191 mm) - ACCESSORY RAIL M-LOK - OPERATING SYSTEM Direct Impingement - WEIGHT 7 lbs (3.2 kg)