Sightmark SM39021 .22 LR Laser Boresighter

The Sightmark SM39021 is a chamber-mounted laser boresighter designed for .22 LR rifles. Chamber it like a standard .22 LR cartridge and the unit projects a red laser dot to indicate point of aim for initial sighting. The boresighter uses a brass cartridge body and ships with an external battery pack, two AAA batteries, and a carrying case. Its chamber mount design makes it simple to use for preliminary zeroing and scope or sight adjustments.

Key Specifications

• The product type is a Laser Boresighter.
• The style is listed as Laser.
• The mount is a Chamber fitment.
• The caliber/gauge is .22 LR.
• The cartridge is specified as .22 LR.
• The material is Brass.
• The battery configuration is an External Battery Box with included AAA batteries.
• The package quantity is 1 unit.
• The listed dimensions are 1.35 X 5.00 X 7.50.

This boresighter streamlines the sight-in process by providing a clear initial point of aim without firing live rounds. Its chamber-mounted brass body and included accessories make it a practical tool for sighting .22 LR rifles for target work, training, and field use.