Sightmark triple duty compact green laser sight - Sightmark Triple Duty Compact Green Laser Sight

Nice laser. I have it mounted on an S&W M&P 15-22. I have taken it to the range two times so far and it seems to hold zero fairly well. The green laser can be easily seen in day time. Of course, on a very bright day, it is going to be a little harder to see than on a somewhat cloudy day. It does have a blinking flashing mode, so that helps in locating the dot.

It is easy to turn on and off. The button is easy to operate. I actually have it mounted on the top rail, just in front of a scope. I have removed the iron sights so I can mount a scope, so mounting it on top isn't an issue. Although, the laser sits fairly high, it does not interfer with the scope. The reason I have it mounted on the top rail is that so I can easily operate the on off switch with my thumb. This set up is very intuitive while holding the rifle in the firing position. It requires minimal movements from the left hand, merely moving your thumb a very small distance. Mounting it this way keeps you from having to attach the remote switch, which I think makes the weapon very cumbersome. You do not need any wires routed around the weapon.

This is a good unit. I like it.