Purchased for my HK USP Compact 40 Quality manufactured product and fits perfectly in the USP's rear site. It's TIGHT! Heed their warning to use a site push tool for installation. Once it's there, it's there for good. Fast Shipping, and Excellent Customer Service.

Perfect fit for my H&K USP compact .45. The trijicon optic fit like a glove. Not an OJ glove either!

Good advice fit perfect thank you

My biggest complaint with the UPC Compact 40 has been the sights. It seems like could never get a sight picture that worked for me. Moving to this is a game changer. I put an RMR on it and the fit and quality is exactly what I wanted. Took it to the range and with a bench rest, was hitting all bulls eyes at 45 feet! Of course, because Germans always over-engineer things, I'm not happy with the trigger so I'm redoing that next. But this mount is the only way to go with this handgun.

I ended up having to buy two of these. The first one was damaged upon installation. I was using a very good sight pusher tool, but it was so tight, I almost destroyed my sight pusher. I froze both of them and installed them IAW the instructional video. The sight pusher tool worked great removing and installing other sights, but the EGW mounting plate was too tight of a fit for the HK USP Compact. So now, I have one damaged mounting plate I can use for a fishing weight.