The LG-404G green laser sight for 1911 pistols combines Crimson Trace's celebrated Lasergrips platform with the visible advantages of green laser technology. Using the smallest green laser diode available, the LG-404G emits a powerful green beam while still providing over two hours of run time on (4) 2016 batteries. 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 Colt: Officers and Defender, Kimber Compact/Ultra-Carry/ Ultra-Elite, Para-Ordnance Compact/Single-Stack, Springfield Armory Compact/Ultra-Compact, Wilson Combat and most other 1911's with grip screws measuring 2-11/16" apart.