I have their Uni-Max rail laser in red, and I'm pretty happy with it. You can adjust for elevation and windage, ambidextrous activation at the front of the trigger guard, and it has the option of pulsing or steady light. They have it in green too, but it's a lot more expensive and nothing says you're screwed like a red dot anyway. Pretty low-profile, very lightweight. What rocks is their guide rod lasers, but they don't make one for my gun and I don't know that any other could be substituted.