Fusion Firearms 1911 357 Sig UMG Pistol Barrel 6 Inch Wilson/Nowlin Standard Stainless Steel 1911-BBL-1-84. The manufacturer says that Fusion Firearms UMG Barrels 6 Inch is compatible with 1911Fusion Firearms 1911-BBL-1-84: 1911 357 Sig UMG Pistol...