12 Gauge Shotgun Laser Bore Cartridge Helps with Zeroing Your Optics

12 Gauge Shotgun Laser Bore Cartridge - Fits 12 Gauge Shotguns Red Laser: 635-655nm, Max output <5mw, Class IIIa Laser Easy to use, just install the batteries into the Laser cartridge and screw on the base, which turns the laser on. Remove Batteries to turn unit off Factory Pre-Aligned Cartridge Bore Sighters, helps with Zeroing your optics Aluminum Construction Batteries Included Length: 2.4" Weight: 1.7 oz