Side project I'm working on. Trying to keep them authentic looking. Front sight is finished. The post is SCS-able and I've made a blitzkrieg style alternate post as well. Commercially available posts are not interchangeable as I had to move the M3 slot down a few mm.
The rear sight poses more of a challenge. Drum is functional and is basically the same design that the MP22 build uses but I'm still figuring out how to make windage adjustable as there is not a lot of material there to work with. HK sells the bolts individually for these adjustments but $5 each. May try some heat-serts and some set screws to achieve the same result while not forking over $20 minimum for two bolts. For now I'm using a fixed version of the rear sight with the rotating drum.
This was solid advice. Took the T.I.T.S. adjustment concept and applied it to the rear sight. We have windage! Now to revisit the drum elevation...