Caliber 5.56x45MM - Capacity 30 + 1 - Barrel Length 16.1 in. - Overall Length 32-35.5 in. (81-90cm) - Upper Rec. Material 7075-T6 Aluminum - Lower Rec. Material 7075-T6 Aluminum - Upper Rec. Finish Black Hardcoat Anodized - Lower Rec. Finish Black Hardcoat Anodized - Barrel Material 4150 CMV - Front Sight A2 Fixed Front Sight - Barrel Finish Manganese Phosphate - Rear Sight None Included - Barrel Technical 1:7RH 6 Groove Non-Chrome Lined - Fire Mode Semi-Automatic - Trigger Type Single Stage - Grip A2 Pistol Grip - Unloaded Weight 6.44 lbs (2.92 kg) - Operating System Direct Gas Impingement - Safeties Safety Selector Switch - Included Accessories 30rd Magazine Manual Cable Lock