Reliable performance and affordable accuracy – that's what CMMG's Mk3 T .308 Win Upper Group adds to your firearm. CMMG's RKM15 KeyMod free-floating handguard protects hands from hot metal. The medium-taper 16" barrel is crafted of nitrided 416 stainless steel with an accuracy-enhancing 1:10 twist. Muzzle features a removable A2 compensator attached with 5/8"-24 threading. Billet 6061-T6 aluminum upper receiver. Covered by CMMG's lifetime quality guarantee. Made in USA.