Site-Lite SL-150 Ultra-Mag Boresighter (.22–.50 cal, 12 & 20 ga)

The Site-Lite SL-150 Ultra-Mag is a laser boresighter designed to simplify initial optic alignment for handguns, rifles, shotguns and muzzleloaders. A lithium battery powers the unit, and a magnetic arbor centers the laser in the muzzle for consistent alignment without contacting the rifling. Adapters and O-rings are supplied to fit a broad range of calibers and gauges so you can establish a baseline zero at the range efficiently.

Key Specifications

• The model is SL-150 Ultra-Mag from Site-Lite.
• Compatible with .22–.50 caliber handguns and rifles.
• Also fits 12- and 20-gauge shotguns and muzzleloaders.
• Power source is a lithium battery as stated in the product text.
• The arbor uses super-strong magnets to center the laser in the muzzle.
• The kit includes adapters and O-rings for multi-caliber fitment.
• Designed so no metal touches the rifling while boresighting.
• Recommended setup distance is 25 feet to establish a boresight reference for a 100-yard zeroing process.
• Listed weight is 1.05 (unit not specified in source).

The SL-150 Ultra-Mag provides a straightforward, tool-oriented solution for getting optics on paper quickly. Its magnetic arbor and included fitment hardware make it practical for range setup, scope installation and routine optics maintenance across a wide set of firearms without contacting the bore. For shooters who value efficient, reliable alignment tools, this boresighter delivers a focused, no-nonsense capability to speed the sighting-in process.