Sightmark SM39005 Red Laser Boresight .308 Win 7.62x51 NATO

The Sightmark SM39005 red laser boresight streamlines rifle zeroing for .308 Winchester, .243 Winchester, and 7.62x51mm NATO chambered firearms. This precision alignment tool eliminates the need for live ammunition during initial scope setup, saving both time and money at the range.

What Makes This Different

Unlike basic boresighting methods that rely on visual alignment through the barrel, the SM39005 projects a precise red laser dot that corresponds exactly to bore centerline. The machined brass construction ensures consistent chamber fit across multiple rifle platforms. Battery life extends up to 40 minutes of continuous operation, providing ample time for scope adjustments without rushing through the process.

Key Features

• Class IIIA red laser (635nm wavelength) visible up to 100 yards in daylight conditions
• Precision-machined brass case fits .308 Win, .243 Win, and 7.62x51mm NATO chambers
• Includes battery pack with easy-access activation button
• Protective carrying case prevents damage during transport and storage
• Compact 3.2-inch overall length won't interfere with rifle handling
• Works with bolt-action, semi-automatic, and lever-action rifle platforms
• No gunsmithing or permanent modifications required

Field testing demonstrates accuracy within 1 MOA when properly used with quality optics. The boresight proves particularly valuable for hunters establishing quick zeroes on multiple rifles or competitive shooters switching between different loads. Weather-resistant construction handles typical range conditions, though the unit should be stored in the included case when not in use.

Technical Specs

• Caliber compatibility: .308 Winchester, .243 Winchester, 7.62x51mm NATO
• Laser specifications: Class IIIA, 635nm red wavelength
• Battery life: Up to 40 minutes continuous operation
• Overall length: 3.2 inches
• Case material: Precision-machined brass
• Includes: Boresight unit, battery pack, carrying case
• Operating temperature: 14°F to 122°F (-10°C to 50°C)

Professional gunsmiths and serious shooters recognize boresighting as essential preparation before live-fire zeroing. The SM39005 delivers consistent results across multiple rifle platforms while protecting expensive ammunition reserves for final precision work.