Im a novice, been using Ue4 for about 5months (not going hardout) so i dont know heaps and heaps - but i have been learning alot , 2nd i googled and googled and there were no tutorials that really helped or showed anything like you said and i would have to add a ton of sockets to the player skeleton for different weapons.
Im not sure how that would work in real world, all i know is that this works really well for what i need - you dont have to use it or try it but this is just what i came up with. Implementing this should take 5mins , all the time spent was me figuring out how to set it up.