The flagship LG-401 is Crimson Traces 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(R) 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 leversFeatures :Pressure activationRed laserFactory sighted at 50Ft.5 inch diameter at 50 feet