Sightmark SM39003 Red Laser Boresight 30-06 Springfield 270 25-06

The Sightmark SM39003 Red Laser Boresight eliminates wasted ammunition and range time by enabling precise rifle zeroing without firing a shot. This brass-constructed boresight fits 30-06 Springfield, 270 Winchester, and 25-06 Remington chambers for accurate pre-zeroing at home or in the field.

What Makes This Different

Unlike generic boresights that require multiple adapters, the SM39003 features chamber-specific brass construction machined to exact cartridge dimensions. The integrated red laser projects a bright, visible dot at 25 yards in daylight conditions. This precision manufacturing ensures consistent bore alignment across multiple zeroing sessions, reducing scope adjustment guesswork by up to 90% compared to traditional methods.

Key Features

• Class IIIA red laser (635nm wavelength) visible to 100 yards
• Precision-machined brass cartridge case for exact chamber fit
• Compatible with 30-06 Springfield, 270 Winchester, and 25-06 Remington
• Includes rechargeable battery pack with USB charging capability
• Protective carrying case prevents damage during transport
• Activation button positioned for easy operation while chambered
• Durable brass construction withstands repeated chambering cycles

Field testing demonstrates consistent accuracy within 1-inch groups at 25 yards when properly calibrated. The laser remains stable during bolt cycling and extraction, maintaining zero reference point throughout the sighting process. Weather-resistant construction performs reliably in temperatures from -10°F to 120°F. Professional gunsmiths and competitive shooters rely on this boresight for initial scope mounting and seasonal re-zeroing tasks.

Technical Specs

• Laser Class: IIIA (635nm red laser diode)
• Cartridge Compatibility: 30-06 Springfield, 270 Win, 25-06 Rem
• Material: Precision-machined brass cartridge case
• Battery: Rechargeable lithium with USB charging port
• Operating Temperature: -10°F to 120°F (-23°C to 49°C)
• Laser Range: Visible to 100 yards in optimal conditions
• Weight: 2.1 ounces including battery
• Includes: Boresight, battery pack, USB cable, carrying case

The SM39003 transforms scope mounting from a time-consuming range session into a quick home workshop task. Professional accuracy standards meet recreational shooter budgets, delivering consistent results that save both ammunition costs and valuable range time.