Connecting Finished Weapon Parts Together?

Hey, I've tried searching for a way to connect finished Weapon Parts together but can't seem to find a clear answer. Basically i built an MA37 Assault rifle and when the pep work was finished it was in parts. Instead of gluing them then to complete the weapon i done the resin/bondo on the parts instead of working on one big piece. The question is now, how do i connect these together. Is there a type of glue that people can suggest that is good for body filler covered parts? Thanks for any tips.

If you are looking for something solid and tough, gorilla glue is really good for holding pieces together. It hardens similar to a resin and I've seen it used in a lot of different projects. Can be found anywhere pretty much. I've seen it at Staples, Home Depot, ect...

Jb weld

Thanks for both of your suggestions. I will try gorilla glue first as i can pick it up at my local store and test it out on a small test piece. If it doesn't bond together securely enough i will order some jb weld.