Excellent laser - Crimson Trace Laserguard Laser for Glock 42 and Glock 43

I have several Crimson Trace Lasers and am quite pleased with each of them. These products are easy to install and seem to hold up well over time. Specifically, they stay on target with little or no adjustments needed after repeated use. They are more expensive then other units but you get what you pay for, and these units seem to work better than some others I have tried in the past.