I had to modify the mounting screws that came from Holosun. They were too long. Did you have a similar experience? Love the PDP though. I'm using large grip. Feels so good in the hand! Was looking at getting some trijicon suppressor height sites next.C&H milspec plate came in today so I guess my PDP is all set up. The milspec plate is way nicer than the free RMR plate sitting on the bench vise in the photo. The 509T is very tight in the slide pocket, which is really great.
Fantastic shooter; even my 13 year old daughter who has never shot pistols was center punching the target. Irons are $39 suppressor height Glock sights from AIM Surplus, they provide a lower 1/4 cowitness.
I have other modern Walther pistols but this is my favorite for sure.