Crimson Trace DS-123 Defender Series Accu-Guard Red Laser Sight for Springfield Armory XD, XD MOD.2 and XD(M) Pistols POWERFUL RED LASER: Features a 5mW peak, 620-670nm, Class 3R visible red laser - the brighest beam allowed by law. N-GAGE ACTIVATION: Ambidextrous Tap-On / Tap-Off Push Button Controls for immediate laser activation from either side of the unit. OVER TWO HOURS OF BATTERY LIFE: Powered by one 1/3N Battery (included). FITS Springfield Armory XD, XD(M) Does NOT fit Tactical 5" & Service 4" with single rail notch EASY INSTALLATION: User installed- no gunsmithing required. Factory sighted at 50 feet, but is fully user adjustable for Windage and Elevation with provided tool.