The 1911 laser sight model for Government and Commander variants. Featuring a rugged polymer side panels and a rubber Overmold activation button, these are the recommended Lasergrips for most 1911 shooters. Standard to Crimson Trace Lasergrips, the LG-401 features instinctive activation. This means that the laser sight automatically springs to life when the weapon is held in a natural firing grip. This product is not compatible with ambidextrous safety levers. We stock shortened ambi-safeties from Wilson Combat in Black and Stainless. Gunsmith installation is required. *Fits 1911 and 1911A1 Full-Size Frames: Auto-Ordnance, Les Baer, Colt, Kimber, Nighthawk Custom, Olympic Arms, Para-Ordnance Full-Size/Single-Stack, Safari Arms, Sig Sauer, Smith & Wesson, Springfield Armory, Taurus, Dan Wesson, Wilson and most other 1911&';s with grip screws measuring 3 1/16" apart.