I wanted to bring this thread full circle and share my experience adding the swept mount to the rifle.
The fit and finish of the mount from Numrich is satisfactory, and the Meopta reproduction ZF4 is excellent. I did have some issues with the hardware that Numrich included with the scope mount breaking. One of the scope band screw heads broke as I was tightening it and one of the receiver mount screws broke a couple rounds into the first firing session. I was able to get some hardened screws from the local hardware store, grind down the heads to fit the receiver mount, and haven’t had any issues since.
Another thing I noticed is that the mount has provisions for a couple of extra dowels/lugs to be installed into the receiver to help take the sheer load off of the mounting screws. These are not tapered from what I can tell, and that part of the receiver wall is along the internal magazine. Since the receiver wall is relatively thin, drilling holes for the lugs would essentially allow them to drop directly into the internal magazine unless they were soldered or welded in place. I’m hesitant to drill the receiver holes small enough for a press fit of the lugs since it is a firearm and may be prone to heating and cooling relatively quickly, but I still may give this a try if the mounting hardware breaks again. I’m curious to know if anyone else has had experience with this type of mounting strategy. From what I understand, none of the WWII German snipers utilized these lugs and silver soldering was used in various ways.
I spent a lot of hours hand fitting the reproduction cupped butt plate to the stock and wouldn’t recommend doing that without access to a proper mill. I should have just put a reproduction early butt plate on the stock like it was already machined for and called it a day. I also had to add a correct rear band to keep the top hand guard from walking forward.
Overall, I’m very happy with the result and ended up with a beautiful shooter.