The pistol grip has a section cut out of it to fit the contour of the ruger trigger guard.But it is a real AK piece,just modified
The butt stock doesn't attach to a trunnion like an ak,its just screwed in by the sides,so drilling 2 holes through a wood ak unit would allow you to attach it
There is no upper hand guard on a krinker,just a little heat shield,but a modified sks upper can be used to give it the appearance you're looking for.