HK3P is the FULLY TRADED WE guns. I have a HK3P Gen 4 Glock 17
the gun is 85% compatible with Marui Parts, Anything above that would require licencing rights from Marui and they dont have this. Thus the whole manufacturing sueing majig thing
parts might need modification etc. I had a picture of my brothers modified HK3P Gen 4 Glock posted in the media section a month ago, it runs a airsoft surgeon Salient Arms G17 Slide. required modification to fit into it aka some filing down and whatnot. other parts im not too sure.
but from what i can tell you, we should all wait for the VFC Glock Series to come out XD (you didnt hear this from me