Dual purpose laser trainer cartridges offer unmatched versatility. Quickly and easily sight in your iron sights, laser sights or optics without going to the range using the bore sight end cap. Swap out and use the laser trainer cap to train with LaserLyte electronic targets.Features :Each cartridge includes two swappable end caps to allow for use as a bore sight cartridge or laser trainerEasily drops into the chamber without damage and aligns to the boreBatteries includedLaser trainer cap is firing pin activated and emits a red laser for a split second to show bullet impact every time your hammer or striker firesLaser bore sight cap is constant ON for accurate sight-in of scopes, red dots, iron sights or laser sightsFiring pin activated laser trainer cap works with all LaserLyte targets for dry fire practice