I was working on a mod, and I accidentally tore out three of the threaded parts that the screws actually thread into. Is there a good, strong way to reconnect this to the shell, or am I screwed? 
I have all of the missing pieces, hanging onto their screws. Before somebody suggests that I just ignore them, these are three of the four screws holding the stock and rear of my Xbow together.
Should I just pack the shell full of epoxy putty once I have my internals figured out?