Moisin is a clunky ungainly thing, but the mount is brilliant and the scope very good. Have to admit that I've never had a PU in my hands, so don't know if it was like the 1937 PEM I had that had no detents on the adjustment drums: not very clever that, and they turned quite easily. Still, at least you could read the adjustment scales with the rifle in your shoulder, unlike the Zeiss Zielvier.

The only mount system I'm aware of that could be screwed onto any rifle, then zeroed on the base alone, with repeatability if removed. Hopefully someone deferred their travels east with that design.