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 ENDEAVORMk3 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, CMMGbuilds 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. Check out our CMMG Resources article to learn more about the Mk3 platform.Each CMMG ENDEAVOR rifle is purpose-built for long-range performance, with everything from the MagpulMOErifle stock to the ZEROED(TM) muzzle brake, and every part in between selected for its utility to the avid marksman.The EML(TM) 15 handguard maximizes customization potential. M-LOKattachment 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.ZEROED parts and accessories - Quality comes standardThe AR platform is well known for its capability for customization but picking the right parts doesn't have to be a nightmare of homework. CMMG's ZEROED parts and accessories are made here in the USA with quality and attention to detail that is second to none and each ENDEAVOR comes equipped with a slew of ZEROED parts standard, including:ZEROED Drop-In TriggerZEROED Pistol GripZEROED 60deg/90deg Ambi SafetyZEROED .308 Ambi Charging HandleZEROED Ambi Mag CatchZEROED Extended Mag Release ButtonZEROED AR10 Bolt CatchZEROED Mk3 Polymer Dust CoverZEROED Muzzle Brake .308Lifetime Quality GuaranteeWe aim to please, that's why every CMMG product is backed by our Lifetime Quality Guarantee against material or workmanship defects. Learn More.~Firearms shipping to states with magazine capacity restrictions will only ship with 10rd magazines in place of standard capacity magazines. CMMG does not address any other state compliancy requirements for further restricted states.