CMR-201 Rail Master Universal Laser Sight for Rail-Equipped Pistols and Rifles Fits pistols, rifles, and shotguns with M1913 Picatinny or Weaver Accessory Rail including: 1911 Government or Commander with Rail AR-15/M16 or similar rail-equipped long guns Beretta PX4 Full Size and Compact, 92Vertec GLOCK 3rd Gen 17, 19, 20, 21, 22, 23, 31, 32, 34, 35, 38 GLOCK 4th Gen 17 and 19 Heckler & Koch (HK) P30, 45, 45C Ruger SR9, SR40, SR9c, SR40c Sig Sauer P220, P226, P229 Smith & Wesson M&P Full-Size and Compact Smith & Wesson SD Springfield Armory XD and XD(M) Taurus Millennium Pro, 24/7 Most other rail-equipped pistols with a minimum of 1 1/16" from recoil lug. The highly anticipated CMR-201 Rail Master Laser is an instantly activated universal laser sight for Picatinny or Weaver rail equipped pistols and rifles. The CMR-201 marks Crimson Trace's first universal fit laser sight and built with the industry leading quality, ergonomics, and fit. Platform Universal Material Polymer Attachment Accessory Rail Attachment Activation Location Switch Activation Sighting Factory Sighted at 50' Battery Type One 1/3N Lithium Battery Laser Battery Life Over Four Hours Laser Output 5mW Red Laser Activation Mode Instant Activation Laser Visibility Approx .5 Inch Diameter at 50 Feet Wrench Size 0.05 Finish Polymer Housing Installation User Installed Warranty Three Year Full Warranty Color Black Dot Size Approx. 0.50 at 50'