Bore Lasers
A bore sight laser is a zeroing tool that inserts into the chamber or muzzle of a firearm and projects a laser dot onto the target, letting you align your scope or red dot to the bore axis before firing a single round. Bore sighting doesn’t replace live-fire zeroing, but it gets you on paper at 25–100 yards so your first shots are close enough to adjust from — saving ammunition, time, and the frustration of chasing a zero across a target you can’t even see impacts on.
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Chamber-Insert vs. Muzzle-Mount Bore Sighters
Chamber-insert bore sights are shaped like a cartridge for a specific caliber — drop it into the chamber, close the action, and the laser projects through the barrel. They’re the most popular type: simple, caliber-specific, and inexpensive. Muzzle-mount bore sighters clamp to the muzzle and work across multiple calibers and barrel lengths — more versatile but slightly more involved to set up and align.
How to Use a Bore Sight Laser
Insert the bore sight into the chamber (or mount to the muzzle). Point the firearm at a target 25–50 yards away from a stable rest or gun vise. The laser dot shows where the bore is pointed. Adjust your scope turrets or red dot until the reticle aligns with the laser dot. Remove the bore sight and confirm with live fire — you should be within a few inches of point of aim, close enough to finalize zero with 3–5 rounds.
Caliber-Specific Bore Sights
Chamber-insert bore sights are available in virtually every common caliber: .223/5.56, .308/7.62x51, 6.5 Creedmoor, .30-06, .300 Win Mag, .300 Blackout, 12 gauge, 20 gauge, 9mm, .45 ACP, and many more. Always match the bore sight to the exact chamber of your firearm.
When to Bore Sight
Bore sight any time you mount a new scope, replace a scope, move a scope between rifles, or suspect your zero has been knocked off after transport or a hard impact. A quick bore sight check at home confirms whether the optic is still aligned before you drive to the range.
Red vs. Green Bore Sight Lasers
Red lasers are the standard and work well indoors and at shorter ranges. Green lasers are visible at greater distances and in brighter ambient light — useful for bore sighting at outdoor ranges in daylight. Green bore sights typically cost more than red.
Frequently Asked Questions
Does bore sighting replace zeroing at the range?
No — bore sighting gets you on paper. You still need live-fire confirmation and fine-tuning.
How accurate is a laser bore sight?
Most quality bore sights get you within 2–4 inches at 100 yards — close enough to see your first shot on a standard target.
Can I bore sight a red dot or holographic sight?
Yes — bore sighting works with any optic type including scopes, red dots, holographic sights, and iron sights.
Do I need a different bore sight for each caliber?
For chamber-insert types, yes. Muzzle-mount types are adjustable across multiple calibers.
See Also: Rifle Scopes • Red Dot Sights • Cleaning Tools • Gun Cleaning