Great laser-however - AIM Sports Tactical Red Laser Sight with Sliding Switch, Rail

Purchased this about a month ago & go shooting once a week at the range. Works really great. However, make sure to install it as close to the trigger as possible. Also, DO NOT change the screw allen head bolt for the one that works with the allen wrench. The screw is big and looks like it would be a problem in the holster- it's not. I tried several times changing the screw and the laser fell off the gun after two or three shots. With the large screw it stays put. Make sure to also adjust for right and left (windage) and for up and down (elevation). You may be able to do this at home before even getting to the range. This was an extremely good investment.