1911 Barrel, Fusion Firearms “Ultra Match Grade(UMG)” 1911 4.25" Commander Length 1911 Colt style Wilson/Nowlin Ramped barrel chambered in 9mm. 416R Certified Stainless steel(eddystone verified, Rifle grade), Precision button Rifled, Hand honed and Air-gauged bore, accu-bored chambers, precision broached, all precision cnc machined and manufactured with basic fitting points on the back of the hood and bottom of feet, so that most folks with a hand file or emory cloth precision fit for outstanding lock-up and superior match accuracy. 1:10 Twist Ratio. These will drop in tightly on many production manufactured 1911’s, helping with a consistent tight lock-up and improved accuracy. The barrel foot is made to work and time precisely with a standard No.3 (.278”) Link or you can use the link you desire for best fit in your pistol. Barrel Bushing boss diameter is at .581 which is match standard and will work well with our Fusion Firearms Match barrel bushings. The .581 diameter is also turned back Long enough so that you also have the flexibility to turn the barrel back to shorter lengths and still can use a standard or match barrel bushing. The threaded model has US Suppressor standard .500"-28 thread. Barrel Hood engraved Fusion Match 9mm. Manufactured in the USA!