Sitelite SL-150 Ultra Mag Boresighter

The Sitelite SL-150 Ultra Mag Boresighter is a precision aiming tool designed for shooters who demand fast, accurate zero confirmation without firing a round. Whether you're a law enforcement armorer, military gunsmith, or competitive rifleman, this boresighter streamlines the critical pre-range setup phase that separates tight groups from wasted ammunition. The SL-150 addresses a fundamental operational need: establishing a reliable bore-to-optic relationship quickly, safely, and repeatably—essential when zeroing multiple weapons, troubleshooting sight misalignment, or validating duty rifle readiness in the field.

The Ultra Mag designation reflects the SL-150's capability to function across magnum and standard rifle calibers, delivering consistent laser alignment that eliminates parallax errors inherent to traditional iron-sight zeroing. The boresighter's compact profile—measuring 5.95 x 2.1 x 10.1 inches and weighing just 1.05 lbs—makes it ideal for go-bag inclusion or permanent placement in an armory. Concept Development Corp.'s engineering ensures the laser delivers repeatable point-of-aim accuracy at common range distances, allowing shooters to confirm optic mounting torque, confirm bore concentricity, and validate sight picture before live fire. The lightweight construction means no additional case burden during tactical operations or training evolutions.

Professionals managing weapon systems across departments or units benefit most from the SL-150's efficiency and reusability. Law enforcement firearms instructors use it to verify duty rifle zero after maintenance; military armorers rely on it to validate zero retention across platform variants; long-range precision shooters employ it to eliminate first-shot fliers caused by unknown sight offset. The boresighter pairs seamlessly with any rifle featuring a standard chamber or magazine well, making it a universal component of any credible firearms support kit. Its portability and reliability make it equally valuable in training ranges, tactical readiness inspections, and field repairs where ammunition conservation and rapid verification are operational imperatives.