Sorry, I missed your question. Umm, it wouldn’t be hard, you just need animations (poses) for the gun and uncheck the bool that hides the hands on guns. You will have to set up a animtion blueprint for the hands and pass the type of gun into it so that it knows what hand pose to use.
Right hands are coming to weapon master in 1.2 which is likely around Dec-Jan time frame. So if you can wait we are already adding that.
Hands for VR should work as long as they are based on the epic hand skeleton. I think I have a tutorial for setting that up with weapon master. Is that the one with the sci-fi hands?
Hope this helps!