Don't buy it - Hawk Gazer LG-9T Green Laser Sights

First of all, its a little odd on the operation of it. Second, it stopped working before I even got to actually use it. So while it's on, you have to put your trigger finger on the sensor to monentarily turn it off. So when you are ready to shoot in the general vicinity, take your finger off(this is when the Lazer turns on) and then you can actually us it to aim and then shoot. But then again, I wouldn't know. After 2 days of dry firing and getting used to it, it stopped working. At first it would shut off ever 30 seconds. Then it wouldn't turn on at all until I had the charger plugged in. Then it stopped all together within a day.