Features: BRIGHTNESS: Features a 5mW peak 630-670nm Class 3A visible red laser that is in conformance with and complies with 21 CFR 1040.10 with a max power output of "5mW" for a "Class 3R Red Laser" - the brightest beam allowed by law EASE OF USE: Laser automatically turns on when closed into chamber - Align scope iron sights or laser sight with the beam coming from the bore sight CONVENIENT: Use the .223/5.56 base laser cartridge or insert into adapter cartridges to change caliber COMPATIBLE: Works with all LaserLyte laser trainer targets FITS: .223 5.56 x 45mm NATO .25-06 .270 .30-06 .243 .308 7mm-08 .260