- 5" Government-length Colt 1911 and 1911 clones — un-threaded barrels only
- Fits barrels with an outside diameter between .577" and .581"
- Calibers up to and including .45 ACP; also works on .38 Super and 9mm 1911 conversions
- Commander (4.25"), Officer / Compact (4" or shorter)
- Bull-barrel 1911 designs
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