Barrel: 24 superior quality stainless steel (416R) with 5R rifling – Muzzle Brake: 5/8 x 24 stainless steel (416R) – Rifling: 1:8 Twist – Lower: Aluminum billet (7075) – Upper: Aluminum billet – Handguard: 20 Aluminum M-Lok upper picatinny rail – Gas Block: .750 4150 Steel Black Oxide Coated – Gas System: Rifle – Stock: Hogue fixed rifle stock black – Grip: Standard – BCG (Bolt Carrier Group): Custom design – Charging Handle: Custom design – AR-10 Compatible parts: Lower parts kits trigger safety – Magazine: GLFA custom aluminum 5 round black – Magazine has open witness window and tabs to pull down for easy loading