No issues in the short term - Crimson Trace CMR-201 Rail Master Red Laser Sight w/ Universal Mount

Purchased this for my AR a couple weeks ago. I zeroed it at 35yds, took 7 minutes to mount and zero. I fired 25rnds and the laser stayed zeroed. I bought this to for a back up sight when I'm night hunting hogs. It's small, lightweight, and easy to operate. This is not the tool for long range shooting, the dot gets pretty big past 50yds. This is definitely designed for a pistol or close range encounters , but works well for my purposes. Can't say much about durability, how it reacts in the rain, or battery life but again no issues in the short term.