16 4150CM Nitride-Coated Barrel (1:7 Twist) – .750 Mid-Length Gas System – Diamond-Honed Nitride M16 BCG – APF 4.5 lb. Drop-In Trigger – APF Adjustable Gas Block – Magpul MOE PR Stock – Magpul MOE Grip – APF 15 M-Lok Handguard – Forged Receiver – Caliber/ Gauge: 5.56 NATO – Barrel Length: 16 4150CM Nitride- Coated Barrel – Action: Semi-Auto – Front Sight: Rear Sight: None – Color: Bull Shark Gray – Finish: Cerakote – Material: Aluminum – Hand: Right