I have a couple of Holosun optics and like them, so I decided to put a new SCS on an H&K VP9. The SCS is made for the pistol and doesn't require an adaptor plate. Had an awful time getting the H&K screws out to remove the cover plate. Followed the instructions for mounting the Holosun and everything looked ready to go. Took it to the range and fired one shot. POW! Something struck me in the forehead - hard! The case dropped on the bench in front of me, so I thought that's what hit me, and was surprised because that had never happened before. Then I realized that the Holosun was on the floor instead of on top of the pistol. The cheap screws that came with it both sheared off and sent the sight flying. In the picture you can see the remains of the screws in the top of the slide. To it's credit, for the millisecond that it worked, the sight put that one bullet almost dead-on the center of the target. Technically, it also hit the dead center of my forehead. I called Holosun to share my angst and the rep said that was really unusual and didn't normally happen. Then he told me what their standard payout was for having the screw fragments removed from the slide. I instantly knew he lied to me, but decided not to send the conversation in that direction. I called a gunsmith and will take the slide there next week so it can - hopefully - get fixed. (As an option, Holosun will let you send the slide to them for servicing.) Here's another thing: On their product web site, Holosun charges $3 EACH for replacement screws, and I'm willing to bet they're the same crap as they sent with the sight. For that level of quality you should get 100 screws for $3. Before someone asks, the sight still works.