6.5 Creedmoor, 18” Stainless Steel Heavy Barrel, 1:8 Twist, Rifle Length Gas System, 15” MLOK Split Rail MLOK|Rifle Engraved Lower BCA AR-10 Complete rifle has a 18" Stainless Heavy barrel, and features a 1:8 Twist Rate, a Rifle length gas system. It includes the new 15" MLOK Split Rail, an M4 flat-top billet upper receiver with forwarding assist, a BCA Bolt Carrier Group, a Flash Hider, and a rear Charging Handle. It is chambered in 6.5 Creedmoor. This rifle comes on the 6.5CM BCA AR10 Billet Lower engraved then anodize NEED CWP NO FELONS BE OVER 21 Trade wanted dan wesson 44 magnum OR 410 SHOTGUN SIDE BY SIDE sxs