Help with PDR?
The PDR is a tricky gun because it's a bullpup with limited space in the stock for a firing system. This would require something advanced like either a special bolt action system or perhaps a slingshot? It also has some interesting structures like the back handle brace and entire front grip.
Here's a picture of my first try. I was mostly focused on the back part and making it practical as opposed to super realistic. This is more of an example seeing how we'll probably need to completely redesign it. I also provided a picture for the real one (well in drawing form) and a couple of important notes. PM if you're willing to work on this with me. Please, experienced builders only.