Threaded Target Barrel Assembly comes complete with Barrel Nut, Washer and Tapped for 7/8" Cantilever Scope Mount [mount not included, see item #85] . This 4140 all steel barrel is 16" in length, .22 cal., twist 1:14. threaded muzzle ½ x 28 x .400, silver knurled aluminum thread protector included. The aluminum barrel nut is black anodized and the barrel is blued a black finish, weight 2.25 lbs