Description
The Firefield FF39016 in-chamber boresight provides a visible red laser dot to speed initial sight alignment for rifles chambered in .223 Remington/5.56 NATO. It installs directly into the chamber and projects a point of aim that corresponds to the barrel’s orientation, allowing shooter adjustments before live-fire verification. Designed for range use and field sighting, the unit is intended to reduce wasted ammunition during the zeroing process.
Key Specifications
- Compatible with .223 Rem/5.56 NATO chambers for in-chamber boresighting.
- Model designation is 223/556 Boresight.
- Constructed from brass to replicate cartridge dimensions and protect internal components.
- Finish and color are brass.
- Laser wavelength is 632–650 nm in the visible red spectrum.
- Output power is specified at <5 mW.
- Rated operating temperature range is 15–120 °F.
- Powered by two AG5 or three AG3 batteries with up to one hour of run time.
- Product type is a boresighter for initial sighting and zeroing.
Built to mirror cartridge dimensions and provide a clear aiming point, this Firefield boresight makes initial sight alignment straightforward and efficient. Its simple in-chamber installation, rugged brass construction, and visible red laser output are practical for range sessions and field sighting, helping shooters get on target faster with less live-fire adjustment.






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