The Sightmark Red Laser Boresight, .300 Winchester Magnum (Sightmark part no. SM39006) is a red laser boresight that chambers in a .300 Win Mag rifle like a regular cartridge. A red laser dot shows where the bore is pointing, so you can adjust your sights or scope before you spend ammunition on zeroing. Sightmark includes a carrying case and batteries with it. It is a quick, low-cost way to get on paper at the range.

Key Specifications

• It is made for .300 Winchester Magnum rifles, so it matches the chambering it is named for.
• The laser is a visible red laser at 632-650 nm, bright enough to see on a target at sighting distance.
• The sighting range is 15 to 100 yards, so you can use it at close range or at the full 100 yards.
• The dot measures 2 inches at 100 yards, a small enough size to check alignment.
• It switches on and off with an end cap, so there is no separate button to find.
• The body is brass, a durable material for a device that goes in a chamber.
• Three AG3 batteries are included, which power the laser dot.
• Battery life is about 1 hour, enough for a sight-in session.
• A carrying case is included, which keeps the boresight protected between range trips.
• Laser output is under 5 mW, which is the Sightmark rating for this device.

Frequently Asked Questions

What does this boresight fit? It is made for .300 Winchester Magnum rifles. Choose the Sightmark boresight that matches your caliber or gauge.

How far away can I use it? Sightmark rates it for sighting at 15 to 100 yards, and the dot measures 2 inches at 100 yards.

What comes with it? It comes with a carrying case and batteries, along with instructions.

Buy the Sightmark Red Laser Boresight, .300 Winchester Magnum

A boresight saves ammunition and time by getting the optic close before the first shot. This one is matched to .300 Winchester Magnum rifles, and it is a small addition to any range bag. Order it with other scope accessories from our Lubbock, Texas shop for fast direct shipping.