I have been getting a few of these crudely patched up guns lately. Apparently duct tape and hammered on metal scraps are solid means of repair. I would personally scrap the overly damaged parts for… Relatively new parts. But thats just me…

More Angles here:
http://crionscustoms.tumblr.com/post/145136523085/nerf-strongarm-patched-up-i-have-been-getting