Sightmark .44 Magnum Boresight Precision accuracy. Older .380 pistols have no issue with our boresights as they are a bit larger, manufactures are making firearms smaller to make more compact pistols of any caliber. Fastest gun zeroing and sighting system Reduce wasted cartridges and shells Easy to pack and travel Comes with a carrying case. For use with pistols with 30mm ejection port or larger Class IIIA laser; 5mW or less