INSTOCK Sightmark .223, 5.56x45 NATO Boresight with Red Laser sighting

Sightmark .223, 5.56x45 NATO Boresight with Red Laser Tested and recommended by the National Tactical Officers Association, the Sightmark®.223 Boresight significantly reduces wasted cartridges and shells. Chamber the device in your .223 rifle like a regular cartridge, and a red laser dot shows exactly where you're aiming. Simply adjust your sights or scope, and save your extra ammo for the hunt. Includes a carrying case, three (3) AG3 batteries, and instructions. Features Precision accuracy Reliable and durable Fastest gun zeroing and sighting system Reduce wasted cartridges and shells Compact and lightweight Easy to pack and travel Specs .223, 5.56x45 NATO Boresight Laser Wavelength 632-650 nm LED Type Visible red laser Output Power <5 mW Battery Type AG5 2 Battery Type AG3 3 Battery Life 1 hour Range for Sighting 15 - 100 yds Dot Size 2 in @100yd Operation on/off end cap Material Brass Operating Temp,?F/?C 14 to 122 / -10 to 50 F/C