Nice quality unit - Sightmark LoPro Green Laser Sight

Good price, performance, and product. The 50 meter dot, in bright daylight, is quite visible and strong. At night it is almost too strong and with NVGs almost too bright, but it is excellent for checking the alignment of my passive IR targeting laser out to 300 meters. I have it mounted on the front right side of the quad rail, the mount holds well there and is out of the way of other optics. In the product pictures, you'll notice a little black strap on the back, this is the cover for the pressure switch attachment port. If this cover comes off it is difficult to reposition to keep the system water resistant (CAMO tape helps secure it, the tan color fits right into camo). The control knobs are smooth but can be bumped and easily turned so alignment must be checked. The design needs locking rings on these knobs to hold alignment in rough conditions like sliding in and out of carry bags. The on off switch works fine and is easily located and functioned with gloves on. The battery compartment is well designed but the spring on the inside cover goes with the positive end of the battery, counter intuitive, but follow the nice orientation picture on the unit. Overall a good deal.
Good product if you have the real estate to mount it.