Firefield FF39012 In-Chamber 308 Win/243 Win/7.62x51mm, Red Laser 632-650nM Wavelength
$23.97
The Firefield FF39012 in-chamber bore sighter is a fast, accurate way to get your rifle on target before you head to the range or into the field. This red laser bore sighter fits directly into the chamber of .308 Winchester, .243 Winchester, and 7.62x51mm NATO rifles, projecting a visible aiming point downrange without firing a shot. It's the kind of tool that saves ammunition, time, and frustration—especially valuable if you've just mounted a new scope, switched loads, or are zeroing a rifle you haven't shot in a while.
Red laser bore sighters work by using the rifle's bore as a natural collimator. Insert the sighter into the chamber, aim at a distant target or wall, and adjust your scope's reticle to match the laser dot. The Firefield's red laser operates in the 632–650nM wavelength range, making it visible in indoor and outdoor settings. Because it's chambered rather than mounted on the barrel, it centers in the bore itself, eliminating parallax errors that can creep in with barrel-mounted alternatives.
This is a straightforward, reliable tool for hunters, precision shooters, and anyone who wants to verify zero without burning through expensive ammunition. It's particularly handy between hunts or seasons when you want a quick sanity check before heading out, or when you're dialing in a new rifle build and want to confirm your starting point before committing to a full range session.
Key Features
- In-chamber design centers directly in bore for precise reference point
- Red laser (632–650nM wavelength) visible in daylight and low-light conditions
- Compatible with .308 Winchester, .243 Winchester, and 7.62x51mm NATO chambers
- No ammunition required—saves time and cost during initial zeroing
- Eliminates guesswork when mounting new optics or changing loads
Specifications
| Caliber Compatibility | .308 Win, .243 Win, 7.62x51mm NATO |
| Laser Type | Red laser |
| Wavelength | 632–650nM |
| Mounting Method | In-chamber |
Frequently Asked Questions
Will this bore sighter work with my .308 Winchester rifle?
Yes. The Firefield FF39012 is chambered for .308 Winchester and will fit directly into your rifle's chamber.
Can I use this with a .243 Winchester or 7.62x51mm rifle?
Yes. This sighter is compatible with .243 Winchester and 7.62x51mm NATO rifles as well.
Is the red laser visible in daylight?
The red laser operates at a 632–650nM wavelength, which is visible in both daylight and lower-light indoor settings, though visibility may vary depending on lighting conditions and distance.
Do I need ammunition to use this bore sighter?
No. The in-chamber laser design requires no ammunition—you simply insert it into the chamber, aim downrange, and adjust your scope to match the laser point.
