Sightmark SM39006 .300 Win Mag Red Laser Boresight Tool

The Sightmark SM39006 boresight eliminates costly ammunition waste during rifle zeroing by providing precise barrel alignment reference. This .300 Winchester Magnum boresight projects a visible red laser beam at 632-650nM wavelength, allowing shooters to establish preliminary sight alignment before live fire testing.

What Makes This Different

Unlike generic boresights that require frequent recalibration, the SM39006 features precision-machined brass construction that matches .300 Win Mag chamber dimensions exactly. The integrated laser diode maintains consistent beam projection across temperature variations, while the durable housing withstands repeated chambering cycles. Most competing boresights use plastic components that wear quickly with regular use.

Key Features

• Precision-machined brass body matches .300 Winchester Magnum chamber specifications
• Red laser diode operates at 632-650nM wavelength for optimal visibility
• Class IIIA laser rating provides safe operation with proper eye protection
• Compact design fits completely within rifle chamber for accurate alignment
• Durable construction handles repeated insertion and extraction cycles
• Works with all rifle platforms chambered in .300 Win Mag
• No external batteries or switches required for activation

Field testing shows the SM39006 reduces initial zeroing time by up to 75% compared to traditional trial-and-error methods. The precise laser projection allows shooters to establish windage and elevation settings at close range before moving to longer distances. This proves especially valuable for hunting rifles where ammunition costs can exceed $3 per round, or when range time is limited.

Technical Specs

• Caliber: .300 Winchester Magnum
• Laser wavelength: 632-650nM (red)
• Laser classification: Class IIIA
• Body material: Precision-machined brass
• Overall length: Matches .300 Win Mag cartridge dimensions
• Activation: Automatic when chambered
• Compatible with: All .300 Win Mag rifle platforms
• Country of origin: Designed in USA

Professional gunsmiths and precision shooters rely on the SM39006 for consistent results across multiple rifle setups. The investment pays for itself within the first zeroing session by eliminating wasted ammunition and reducing range time requirements.