Wilson Combat Barrel Bushing. Our Stainless Steel bushings #29S & #29SC are designed for .580 O.D. barrels and require only minor fitting. The #29B Blued bushing is a pistolsmith part with considerably more material on the O.D. and I.D. for use with smaller barrels or when special situations require additional material.; Specifications for Wilson Combat Barrel Bushing: Manufacturer: Wilson Combat Fabric/Material: Stainless Steel Quantity: 1 Package Contents: Wilson Combat Barrel Bushing What firearm models does the manufacturer say Wilson Combat Barrel Bushing is compatible with? The manufacturer suggests that Wilson Combat Barrel Bushing is compatible with Colt 1911 Officer .45 ACP Para Ordnance P12WILS 29B BARREL BUSHING GOVT BLUE