Sightmark SM39004 Red Laser Boresight .7mm .264 .338 Caliber

The Sightmark SM39004 Red Laser Boresight eliminates time-consuming range sessions for initial scope zeroing on .7mm, .264, and .338 caliber rifles. This precision laser boresighting system projects a visible red dot that aligns with your rifle's bore axis, allowing shooters to establish preliminary zero before firing a single round.

What Makes This Different

Unlike basic collimators that require perfect eye alignment, this laser boresight transmits a precise beam directly through the barrel for consistent reference points. The brass construction matches chamber dimensions exactly, preventing movement during the sighting process. Most boresights require frequent battery changes, but this system includes a dedicated battery pack for extended use sessions.

Key Features

• Red laser visibility up to 100 yards in low light conditions
• Precision-machined brass arbor fits .7mm, .264, and .338 caliber chambers
• External battery pack eliminates internal power limitations
• Class IIIA laser output provides clear dot projection
• Protective carrying case prevents damage during transport
• Push-button activation with automatic shutoff function
• Compatible with bolt-action and semi-automatic rifle platforms

Field testing demonstrates consistent accuracy within 2 inches at 25 yards when properly calibrated. Hunters save ammunition costs during initial scope mounting, while competitive shooters reduce range time between equipment changes. The system functions reliably in temperatures from -10°F to 120°F, maintaining laser stability across hunting seasons.

Technical Specs

• Caliber compatibility: .7mm, .264, .338
• Laser type: Red diode, Class IIIA
• Operating range: 15-100 yards optimal visibility
• Battery: External pack with standard alkaline cells
• Construction: CNC-machined brass arbor
• Dimensions: 3.2" overall length
• Weight: 4.2 oz including battery pack
• Includes: Laser unit, battery pack, carrying case

This boresight system delivers consistent results across multiple rifle platforms without requiring expensive range time. Professional gunsmiths and serious shooters recognize the value of precise preliminary alignment before live fire confirmation.