.223 REM MAG Laser Bore Cartridge –

Fits .223 REM/5.56 NATO firearms (AR-15/ M4/ M16)
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
Brass Construction
Batteries Included
Length: 1.8″
Weight: 0.3 oz