Christensen Arms carbon fiber gunsmith barrel blanks designed to be lighter than steel. The barrel lining is match-grade 416R stainless steel, bored, reamed, hand-lapped, and button rifled. Includes threaded muzzle and thread protector. Weight estimates for 20 to 26 inch blanks are approximately 2 lb 12 oz to 3 lb 5 oz. Chamber finishing should only be done by a qualified gunsmith.