||I just got this laser in the mail today, and so far I'm fairly impressed overall.
I don't know if it was a mistake on the web page or not, but I did not get a battery with my laser. When I did get it working, I have to say, it's one really bright laser. I could still barely make it out while pointing it into grass sitting in full sun. I'm not kidding either. I don't know how it does on battery life but that was my biggest concern right there.
However, zeroing this thing was a pain. The X and Y adjusters on the outside of the laser are just for show. You have to take off the front, and with the little silver allen wrench they give you, you have tighten 3 little screws varying degrees in hopes of zeroing it. I just loosened all three, moved the little piece that the laser comes out with another Allen wrench and just tightened all three screws making sure that the little piece didn't move. Took me an hour to finally get all of this figured out and zeroed, but it seems to hold a zero just fine with full auto on my KWA KMP9.
-Seems to hold a zero
-Didn't come with a battery as advertised.
-Extremely difficult to zero
Rating: [4 of 5 Stars!]