450 BUSHMASTER RILFE FEATURES – Action: Semi-Automatic – Ambidextrous Safety: No – Barrel: 18 inch 1:24 Twist Either 416R SS or 4150 CRMOV Nitride 11/16 x 24 threads – Caliber: .450 Bushmaster – Feed Ramps: Modified M4 – Finish: Cerakote – Frame Material: Aluminum 7075 – Gas System: 0.750 Gas Block and Mid Length Gas Tube – Grip: Mil-spec Polymer – Handguard: 15.25 Aluminum 6061 Full picatinny rail – Magazine Capacity: 5 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 Receiver: 7075 Oversized Upper – Overall Length: 35.00 – Weight: 6.4 lbs