The flagship LG-401 is Crimson Trace’s most popular 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