Sitelite Ultra Mag Green Laser Boresighter

The Sitelite Ultra Mag Green Laser Boresighter is a pre-range zeroing tool that cuts setup time and saves ammunition by letting you align your scope to point-of-aim indoors before you head downrange. Instead of burning rounds at 100 yards to dial in a new scope or red dot, this green laser system gets your optics on target from 25 feet away — a massive convenience whether you're tuning a hunting rifle, competition gun, or any centerfire or shotgun in your safe.

What sets the green Ultra Mag apart is its super-bright laser output, engineered for visibility in daylight and strong ambient light where red lasers wash out. The laser itself mounts to a precision aluminum cone that sits inside your bore, held centered by a powerful magnet and O-ring — no adapters to buy, no metal touching your rifling. A system of O-rings and adapters spans .22 to .50 caliber rifles plus 12 and 20 gauge shotguns, so one boresighter works across your entire arsenal.

Beyond basic zeroing, the unit ships with the SRL-100 adapter, which refocuses the laser into a horizontal beam to double as a scope reticle leveler — ensuring your crosshairs sit true, not canted. That level guarantee matters for precision shooting and hunting accuracy. If you work in low indoor light, the standard SL-100 model delivers adequate visibility; the Ultra Mag green is your pick for daylight work or bright conditions where you need maximum dot clarity.

Simple setup, minimal fuss, and broad compatibility make this a smart investment for anyone who shoots multiple platforms or wants to validate zero before committing to ammunition.

Key Features

• Super-bright green laser optimized for daylight and high-ambient-light use
• Pre-range bore alignment from 25 feet eliminates wasted ammunition during zeroing
• Works with rifles (.22 to .50 caliber), AR platforms, and shotguns (12 and 20 gauge)
• Magnetic O-ring system centers in bore with no adapters or metal contact to rifling
• Includes SRL-100 scope reticle leveler adapter for true crosshair alignment
• Compatible with scoped rifles, red dot sights, and iron sights

Specifications

Frequently Asked Questions

Can I use this boresighter on multiple firearms?

Yes. The included system of O-rings and adapters fits rifles from .22 to .50 caliber and 12 and 20 gauge shotguns, so one unit covers nearly any centerfire or shotgun you own.

How is the laser mounted inside the barrel?

The laser sits on an aluminum cone that's held centered in your bore by a powerful magnet and O-ring. There are no metal parts that contact the rifling, and no special adapters are required — just drop it in and you're ready to zero.

What's the difference between the green Ultra Mag and other Sitelite models?

The Ultra Mag green uses a super-bright green laser designed for maximum visibility in daylight and bright ambient light. The standard SL-100 model uses a red laser better suited to indoor, controlled-light environments.

Does this include a scope leveler?

Yes. The kit includes the SRL-100 adapter, which refocuses the laser into a horizontal beam for precise scope reticle leveling — ensuring your crosshairs are true, not canted.