Viewmodels to FE GUN KIT?

Hello, this is my first post on this page :D and I have one question, how to use ready-made viewmodels? for example, I have a viewmodel ready, but I don't have a tool, what should I do to have this gun, what is on this viewmodel? thanks in advance :) :) :) :)

The best thing to do is putting the model of the gun inside of the Tool, make a separate part for where the handle should be, and putting that outside the model. Make sure to weld everything together or it will not work. I hope this helped!