SIGHTMARK 300BLK/7.62X35MM BORESIGHT

Getting your 300 Blackout rifle zeroed accurately starts before you fire a shot. The Sightmark 300BLK/7.62x35mm Boresight uses a laser to align your optic to your bore, saving ammunition and time at the range. Whether you're in San Ramon or Sunnyvale, TacticCAL Gun Store handles FFL transfer in Sunnyvale and stocks precision tools like this one.

Laser alignment before live fire

This boresighter inserts into your 300 Blackout chamber and projects a laser dot onto a target or wall. You adjust your scope turrets until the reticle centers on that dot—your optic is now bore-sighted without burning ammunition. The 7.5-inch length fits standard rifle actions. It's a straightforward process that works indoors or outdoors. Pair it with quality optics from our California-compliant handgun catalog and you'll understand why precision starts before the trigger press. Browse our gun store.

Frequently asked questions

How do I use this boresighter on a 300 Blackout rifle?

Insert the boresighter into your rifle's chamber, point at a distant target or wall, and adjust your scope's windage and elevation turrets until the reticle aligns with the laser dot. Remove the tool and you're bore-sighted.

Can I use this boresighter on other calibers?

No, this model is caliber-specific to 300 Blackout/7.62x35mm. Using it in a different caliber's chamber risks damage and misalignment. Always match the boresighter to your rifle's bore.

Does TacticCAL help with CA compliant firearms?

Yes — TacticCAL specializes in California-compliant handguns from the DOJ Roster and PC §32100 exempt single-action revolvers. Looking for gun store Mountain View? Visit us in Sunnyvale.