Concept Development Corp. Site-Lite SL-100 Mag Laser Boresighter

The Site-Lite SL-100 Mag Laser Boresighter by Concept Development Corp. is a magnetic laser alignment tool intended to simplify initial sighting and scope alignment across a wide range of firearms. It uses a combination of adapters and O-rings and is designed to fit .22 to .50 caliber handguns and rifles, 20 gauge and 12 gauge shotguns, and muzzleloaders without optional adapters. The device is precision machined from anodized aluminum and employs internal magnets to hold the unit in the muzzle for repeatable placement.

Key Specifications

• Compatible calibers: .22 to .50 caliber.
• Also fits: 20 gauge and 12 gauge shotguns and muzzleloaders.
• Construction material: aircraft-quality anodized aluminum.
• Muzzle retention method: system of super strength magnets for repeatable placement.
• No metal contacts the rifling during use: no metal contact with rifling.
• No optional adapters to buy: all adapters and O-rings included per manufacturer description.
• Recommended initial target distance: 25 feet from the muzzle for boresighting.
• Intended final sight alignment after procedure: 100 yards (per manufacturer instructions).
• Weight (as listed in source data): 0.6 (unit not specified in source data).
• Shipping weight (as listed in source data): 0.6 (unit not specified in source data).

The SL-100 provides a straightforward, repeatable method for initial scope alignment across a broad range of firearms. Its magnetic retention and no-contact bore design reduce handling complexity while preserving the bore, and the included adapter/O-ring system eliminates the need for additional purchases. For shooters who value efficient, reliable setup of optics and sights, the SL-100 is a compact, durable tool to keep in a range bag or workbench kit.