Competition 1911 45 Auto Replacement barrel - Match Grade Fits any 1911 style handgun using a 4 1/4" Commander length barrel. 1 in 16" Twist. Stainless Steel Inside Dimensions: .580" Outside Dimensions: .703" Each barrel is made from aircraft grade stainless steel forge. Heat treated to 40 maximum service life. All barrels slightly oversized in lock-up areas and require fitting. Ramped barrels recommended in alloy frame pistols for reliability. Stainless steel. Includes both barrel and bushing. Wilson Combat.
 Fits: Colt Commander LW Commander Combat Commander 1991 A1 Commander Detonics Servicemaster