Ed Brown Products Barrel Bushing 1911 Drop-In Government Stainless Steel. This is a drop-in replacement that will work on most 1911 types with little or no fitting. Available for Government in both blue and stainless and for Commander in stainless. Specs: Heat treated alloy and stainless steel. .581 ID .699 OD. Specifications for Ed Brown Products 1911 Drop-In Barrel Bushing: Manufacturer: Ed Brown Products Color: Stainless Steel Package Contents: Ed Brown Products 1911 Drop-In Barrel Bushing What firearm models does the manufacturer say Ed Brown Products 1911 Drop-In Barrel Bushing is compatible with? The manufacturer suggests that Ed Brown Products 1911 Drop-In Barrel Bushing is compatible with Colt 1911 Commander 4.25in Colt 1911 Government 5inEd Brown Products 833: Barrel Bushing 1911 Drop-In Government Stainless Steel