Action: Semi-Automatic Caliber: 5.56mm NATO Capacity: 30+1 Barrel Length: 16 Inches Barrel Material: Steel (Chrome Lined) Barrel Finish: Manganese Phosphate Finish Muzzle: A2-Type Flash Suppressor Twist Rate: 1:7” Grip: Pistol Upper and Lower Receiver Material: Forged 7075-T6 Aluminum Receiver...