The Sightmark 40 S&W Boresighter is a compact, cartridge-style laser tool designed to make zeroing your .40 Smith & Wesson pistols faster and more efficient. Machined from durable brass and powered by button cell batteries, it seats in the chamber like a standard round and projects a visible red laser that aligns with your bore, helping you get on paper without burning through ammunition.

This model is ideal for confirming sight alignment at home or at the range, whether you are setting up iron sights, a red dot, or an optic-equipped pistol-caliber carbine. It is equally useful as a training aid for draw-and-present drills where you want instant visual feedback on your point of aim. By reducing the number of live rounds needed to fine-tune your zero, it supports more focused practice while reflecting Sightmark’s reputation for practical, shooter-focused innovation.

Key Features:

• Manufacturer: Sightmark
• Model: 40 S&W Boresighter (SM39016)
• Caliber: 40 S&W
• Type: Laser Boresighter
• Style: Cartridge
• Material: Brass
• Laser Color: Red
• Laser Wavelength: 632-650 nm
• Dot Size: 2 in at 100 yards
• Range For Sighting: 15-100 yards
• Battery Type: AG3 / AG5 Button Cells
• Included Accessories: Carrying Case, Batteries, Instructions