This is a FUSION Firearms, 45 ACP Officers ”Drop in" 1911 416 stainless steel PRO-Series Match barrel with matching stainless steel bushing for a 1911 standard Officers model colt style pistol and Clones. This barrel can be used with BOTH Bushing and bushingless set-ups and will work with all 45 acp slide breech faces. These Barrels are some of the best for accuracy and function on the market today. It will improve accuracy with any brand of 1911, dramatically. Work to its best ability when used with our Drop-in match barrel bushing. These parts are made to complement each other. Fusion, Made entirely in the USA on some of the highest grade barrel making equipment available. These are some of the best barrels on the market today. Being match grade some slight fitting may be required. Buy with confidence.. Buy FUSION Parts