Sightmark SM39004 Boresight Red Laser — 7mm/.338/.264

The Sightmark SM39004 Boresight is a chamber-mounted red laser designed to assist with initial optic alignment on compatible rifles. It chambers like a cartridge and projects a visible red dot at the point of aim to reduce time spent aligning sights with live fire. Constructed from brass, the unit ships with batteries and a carrying case for convenient storage and transport.

Key Specifications

• Compatible with 7mm, .338, and .264 rifle bores as listed in the product name.
• The laser provides a sighting range of 15–100 yards for initial alignment.
• Power is supplied by 3 AG3 batteries (included).
• Construction material is brass.
• Operating temperature is listed as -10 to 50 F/C.
• Includes carrying case, three AG3 batteries, and instructions.
• Product type is a bore sighter for use in rifle sighting and zeroing workflows.
• Quantity per package is 1.
• Style is classified as a laser accessory.

Compact and straightforward to use, this brass boresight simplifies preliminary optic setup by projecting a clear red aiming point. It reduces the amount of live-fire adjustment needed during initial zeroing and is a practical tool for range use, field preparation, or any workflow that benefits from efficient optic alignment.