Wilson Combat Match-Grade Barrel Bushings are produced from top-quality steel for maximum reliability and wear. The Stainless Steel bushings are designed for .580" outside diameter barrels and require only minor fitting. Approximate inside dimension is .580". Approximate Outside Dimensions is .703" Fits the Colt Government Model, Enhanced Model, Springfield Armory 1911 A1, Military 1911 and 1911 A1, Auto Ordnance 1911 A1, Norinco 1911 A1, Caspian 1911 A1, Wilson 1996 A2, Safari Arms Matchmaster, Para-Ordnance P-14, Colt Gold Cup, AMT Hardballer and Colt Double Eagle.