LaserMax Green Guide Rod Laser for Glock 20/20SF/21/21SF Gen 1-3, Black - LMS1151G

This LaserMax green guide rod laser mounts directly into the guide rod assembly of Glock 20/20SF/21/21SF Gen 1-3 pistols, providing a 520nM green laser dot for enhanced accuracy. The 5mW laser projects a 0.63" dot at 20 yards with an effective range of 50 meters and operates on a 393 battery. As a guide rod mount system, it requires no permanent modifications to the firearm.