Hey all! I recently saw this video: Virtual Object Experiments with SteamVR in Unity - YouTube
Which shows a shotgun asset for VR with some type of hinge mechanism that allows it to open like a real sawed off shotgun in VR, he made it in unity. I’m getting good with blueprints so I have an idea of how to do the loading of bullets, and firing but I’m not sure how to do the hinge functionality on the shotgun. So if anyone has any idea of whats making this shotgun tick or can point me toward the right path I will be so grateful and if I get the shotgun working a tutorial will soon follow 
please help a young VR dev in his quest for shotgun badassery