I just got this today, so i'm not to sure on how long it will last.
well i got this as an early Christmas present and it took me about 20 minutes to sight it in on my Echo 1 G36C. it wasn't working so bad that i had to flip it over but it worked perfect after that.
its EXTREMELY ACCURATE. i can easily hit this soda bottle from about 80ft.
the laser can be seen from my grandma's house at my house which is about 1000 feet away. i don't know its maximum distance but i'm guessing its far.
-intimidating (i haven't played with it but yesterday i played cqb with a guy who had one and it scared everyone)
-you can see the beam
-fun to mess with cats
-comes with laynard with push button thing for light and cap where you can just push a button on the back and a cap where you screw it in and it turns on like a flashlight.
front cover that you screw off to adjust was in my pocket and got scratched so it messed up the beam like in the way when when it hits its target the beam kinda scatters not bad doesn't effect it AT ALL just might be a con for some people. it lights everything up, i like it.