The AM-10 Ranger is a fresh take on the classic 308 Winchester AM-10. Featuring the newly redesigned Generation 2 Receivers and Handguard. - The Ranger comes standard with: - 18 inch .308 Winchester Mid-length Barrel - 15 inch M-Lok Handguard - Magpul Carbine Buttstock - Magpul K2 Pistol Grip - 2-Stage Trigger System - Lower Receiver Material: Forged 7075 T6 Aluminum - Upper Receiver Material: Forged 7075 T6 Aluminum - Upper Receiver Finish: Type 3 Hard Anodized Black - Lower Receiver Finish: Type 3 Hard Anodized Black - Trigger Guard: Closed Trigger - RF-85 Treated: Non-treated - Bolt Carrier Finish: Nitride - Bolt Carrier Material: 8620 Steel - Bolt Finish: Nitride - Bolt Material: 9310 Steel - Barrel Material: 4150 Chrome Moly Vanadium - Barrel Length: 18 inch - Barrel Finish: Nitride - Barrel Contour: Government Profile - Twist Rate: 1:10 - Fluting: None - Gas System Length: Mid Length - Gas System Type: Low Profile - Gas Block Diameter: .750 inch - Charging Handle: Standard Charging Handle - Hand Guard Type: M-Lok - Hand Guard Length: 15 inch - Pistol Grip: Magpul K2 - Thread Pattern: 5/8-24 - Muzzle Device: Knight Stalker Flash Hider - Buffer Tube: 6 Position Buffer Tube - Butt Stock/Brace: Magpul