The Crimson Trace model LG-401 lasergrip fits the 1911 and 1991A1 full-size frames including: Colt, Springfield, Kimber, Browlin Arms, Olympic Arms, Les Baer, Auto-Ordinance, Wilson, Dan Wesson, Para-Ordinance 7.45 LDA (Full-Size, single stack), and most other 1911's with grip screws measureing 3 1/6' apart. Does not fit models with Ambi Safeties.