Firefield FF39016 In-Chamber .223 Rem/5.56 NATO Red Laser Brass Boresighter

The Firefield FF39016 In-Chamber Red Laser Brass Boresighter is the fastest way to get a .223 Remington/5.56 NATO rifle on target. Drop the boresighter into the chamber, close the bolt, and a bright red laser projects downrange so you can zero any optic or iron sight without ever pulling the trigger.

Built around a brass housing shaped to the cartridge profile, the FF39016 emits a 632-650 nm red laser at <5 mW output. Powered by 2x AG5 or 3x AG3 batteries and rated for roughly 1 hour of run time, the unit delivers a sighting range of 15 to 100 yards for new-optic zeroing, red dot alignment, or troubleshooting an existing setup.

Compact, rugged, and ready to use right out of the package, the Firefield FF39016 saves range time and ammunition by getting you on paper before you ever fire a round.