FUSION Firearms, 45 acp, Standard 6 inch Long-Slide(LS) size/length barrel, ”GUNSMITH FIT" 1911 416R (Rifle Barrel Grade) stainless steel PRO-Series Match barrel for Colt style Government, A-1 pistols and Clones. Will work with all 45 acp Colt style slides 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 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 “Gunsmith Fit” Barrel some fitting of the lugs, hood and barrel foot may be required.