Built around the .308 cartridge the CMMG® Mk3 platform is the larger frame foundation for cartridges such as .308 Win. Material selection is key to a quality rifle which is why the barrel on this .308 ENDEAVOR is made from 416 stainless steel with a nitride finish for durability and corrosion resistance without sacrificing performance. – Platform Mk3 – Caliber .308 WIN – Operating System Compact Action-Direct Impingement – Barrel Length 16.1 – Barrel Twist 1:10 – Barrel Contour MT – Barrel Material 4140CM Nitride Finish – Barrel Twist 1:10 – Muzzle Device CMMG ZEROED Muzzle Brake – Muzzle Thread 5/8 x 24 – Gas Port Location Rifle – Gas Block Adjustable 0.750 – Upper Receiver DISSENT Mk3 7075 T6 Alumunium – Lower Receiver Mk3 Billet 7075 T6 Aluminum – Hand Guard CMMG 15 Proprietary – Finish Cerakote – Charging Handle Dissent Side Charger Reversible – Pistol Grip CMMG ZEROED Pistol Grip – Receiver Extension DISSENT Folding Stock Adapter – Stock / Brace DISSENT Side Folding Stock – Trigger Type ZEROED Drop-In Single Stage – Trigger Guard Integrated – Safety Selector CMMG ZEROED 60/90 Degree – Magazine (2) Magpul 20rd PMAG LR/SR – Weight 8.5 lbs – Length 34.6-37.6 (28.2 Folded)