Action: Semi-Automatic – Ambidextrous Safety: No – Barrel: 16 inch 1:8 Twist Heavy Barrel (HBAR) Either 416R SS or 4150 CRMOV Nitride 1/2 x 28 threads – Caliber: .223 Wylde (Shoots both .223 REM and 5.56 NATO) – Feed Ramps: M4 – Finish: Cerakote – Frame Material: Aluminum 7075 – Gas System: 0.750 Gas Block (Black Oxide) and Carbine Gas Tube – Grip: Mil-spec Polymer – Handguard: 15.25 Aluminum 6061 Full picatinny rail – Magazine Capacity: 30 Round – Mags included: 1 – Muzzle Brake: Included Designed to be 6 degrees forward wrench tightened w/o Loctite – Sights: None – Trigger: Milspec 5.5-6 lb pull – Upper: 7075 Upper – Overall Length: 33.25 – Weight: 6.8 lbs.