The original Colt Government 1911 model has been duplicated by many other manufacturers ( such as Smith & Wesson, Kimber, Ruger, Dan Wesson, Ed Brown, Iver Johnson, Remington, Rock Island Armory, Springfield Armory, Sig Sauer, Taurus, Wilson, Combat, Les Baer, Nighthawk, Para Ordnance, and so many more).
AS a general rule, ALTAMONT 1911 Full-Size Panels will fit all full-size guns made by other manufacturers. You may want to measure the space between screws to make sure you have a Full Size 1911. If your 1911 is 3 1/16 between screws, then you have a Full Size. If your 1911 is 2 11/16 between screws, then it is a Compact, Officers, or Defender 1911.