Carbonsix 18" 1-7.7 twist Remage barrel sendero contour with nut and thread protector. Muzzle is 1/2x28 barrel is brand new. Included is 1 unopened box of Lapua 6.5 grendel brass. Ordered it and took way longer than it was suppose to and have since abandoned the project. $850 shipped with the brass. More brass available to buyer only. Will not split the brass.