l have an 6 in ruger mark 3 standard. If the sights are not quite on from the factory is there a way to fix this. Is it reliable, rugged, accurate, etc.

Another one. Do u guys think it is more like a japanese nambu or a german luger in feel, reliability, accuracy, and function just wondering?

A Mark l standard l had was shooting a bit low and right. l filed almost 1/8'' off the front sight, used a brass punch to drift the rear sight over a bit, and touched up the front sight with come cold blue. It was dead on after that.
The newer Mark I l standard aims fine from the factory.
While they may look a bit like the guns you mention, l think they are a lot more accurate and function better. Not that I've had much experience with either other model...

It is unique in it is action, but it feels a lot like a luger, and is very reliable even though it is a pain the first time you ever try to out it back together