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: Bore sight fits into the barrel of the unloaded firearm using the included caliber adapters - Turn bore sight on and align scope iron sights or laser sight with the beam coming from the bore sight CONVENIENT: Includes daylight laser target for easy adjustments COMPATIBLE: Works with all LaserLyte laser trainer targets FITS: .22-.50 caliber firearms Minimum. 3-inch barrel needed Sight in scopes or iron sights Sight in laser sights