CALIBER 5.56 NATO - BARREL 16 1:8 Twist - WEIGHT 7 lbs. - UPPER RECEIVER Forged 7075 T6 Aluminum Type 3 Hard Anodized Black - LOWER RECEIVER Forged 7075 T6 Aluminum Type 3 Hard Anodized Black - HAND GUARD 15 M-LOK - THREAD PATTERN 1/2-28 - MUZZLE DEVICE A2 Flash Hider - GAS BLOCK .750 Diameter - GAS SYSTEM Low Profile Carbine Length - BUTTSTOCK 6 Position Carbine Buttstock - BUFFER TUBE 6 Position Buffer Tube - BOLT CARRIER Standard M16 Profile - CHARGING HANDLE Standard - PISTOL GRIP A2 Style - SAFETY Ambidextrous