If you want to deliver a hard hitting round at long-range and still have a well-balanced rifle when walking through the field the 20-inch ENDEAVOR® Mk3 in .308 WIN is a prime candidate for the job. Trusted for decades by hunters and marksmen alike .308 WIN delivers excellent results up close and at extended distances and can pack quite a punch. – Carrying on the AR15’s reputation for modularity CMMG® builds our larger caliber rifles like .308 WIN & 6.5 Creedmoor on our Mk3 (AR-10) size platform which is based on the LR-308/DPMS Gen 1 high-pattern design. – Each CMMG ENDEAVOR rifle is purpose-built for long-range performance with everything from the Magpul® MOE® rifle stock to the ZEROED muzzle brake and every part in between selected for its utility to the avid marksman. – The EML 15 handguard maximizes customization potential. M-LOK® attachment slots at the 12 3 6 and 9 o’clock positions give you plenty of real estate to mount accessories while the Picatinny rail sections allow for easy and solid mounting points for sights and accessories. – Platform Mk3 – Caliber .308 WIN – Operating System Direct Impingement – Barrel Length 20 – Barrel Twist 1:10 – Barrel Contour MT – Barrel Material 416SS SBN – Barrel Twist 1:10 – Muzzle Device CMMG ZEROED Muzzle Brake – Muzzle Thread 5/8 x 24 – Gas Port Location Rifle – Gas Block 0.750 Non-Adjustable – Upper Receiver Billet 7075 T6 Aluminum – Lower Receiver Mk3 Billet 7075 T6 Aluminum – Hand Guard CMMG EML15 M-LOK – Finish Cerakote – Charging Handle CMMG ZEROED Ambi – Pistol Grip CMMG ZEROED Pistol Grip – Buffer Type Rifle Mk3/A1 – Receiver Extension A1 – Stock / Brace Magpul MOE Rifle Stock – Trigger Type ZEROED Drop-In – Trigger Guard Integrated – Safety Selector CMMG ZEROED 60/90 Degree – Magazine Magpul 20rd PMAG – Weight 8.8 lbs – Length 41.2