Crimson Trace CMR-301 Rail Master Pro Green Laser Rifle Sight And Tactical Light System - Black - The CMR-301 Rail Master Pro offers robust power and versatility for rail-equipped rifles and carbines. The laser sight and tactical light system provides 1000 Lumens (peak) for illumination and a powerful green laser for precision targeting in variable lighting conditions. The CMR-301 is user programmable and may be operated with pressure pad or tail-cap. It fits standard AR-type modern sporting rifles with M1913 Picatinny or similar accessory rails measuring at least 2-3/4in in length. Beam Intensity: 5MW Peak, 532NM, Class 3R Green Laser Dot Size: Approximately 0.50in At 50ft