If you are looking to build a modern sporting rifle that can do it all, from tree stand or hog hunt or even precision target shooting, the Mk3 Upper Assembly from CMMG is a great choice. The upper boasts an 18" heavy taper barrel made from 416 stainless steel, along with a RKM15 KeyMod free floating handguard that is ready to accept any number of sling mounts, bipods or other accessories. The upper is complete (has charging handle & bolt carrier group) and ready to mount to any LR308 profile lower. Features and Specifications: Manufacturer Number: 38BCC38 .308 Winchester caliber (accepts 7.62 NATO) Billet 6061-T6 aluminum upper receiver LR308 profile 18" heavy taper profile barrel, 416 stainless steel 1:10" twist CMMG RKM15 KeyMod handguard Mil-Std 1913 Picatinny rail A2 compensator Complete with BCG Muzzle threaded 5/8-24