The Sightmark Universal Premium Laser Boresight (brand part no. SM39014) takes a different approach from Sightmark’s caliber-specific boresights: instead of chambering like a cartridge, it attaches magnetically to the muzzle, making it usable across a range of rifle and shotgun bore diameters without needing a dedicated unit for each caliber. A laser boresight is one of the fastest ways to get a scope or optic close to zero before ever loading a live round. Chambered like a standard cartridge, the Sightmark Laser Boresight projects a laser dot along the bore’s axis, letting a shooter align the reticle to that dot on a bench rest rather than burning ammunition through trial and error at the range.

Key Specifications

• Attaches at the muzzle rather than chambering in the action like a cartridge.
• Uses a magnetic attachment for quick on and off use across sessions.
• Classified as a boresighter designed for use across multiple calibers and gauges.
• Weighs approximately 0.3 pounds.

Frequently Asked Questions

How does this boresight attach to the firearm? It attaches magnetically to the muzzle rather than being chambered like a cartridge.

Can I use this on more than one caliber of firearm? Yes, the muzzle-mounted magnetic design is built to work across a range of bore diameters rather than one specific caliber.

Buy the Sightmark Universal Magnetic Premium Laser Boresight

Zero more than one firearm in the safe without buying a dedicated boresight for each caliber. Shop it in our Sightmark lineup within our scope accessories selection, and our Lubbock, Texas team will get it shipped quickly.