This is a simple example on how to make an addon to Techguns by adding a new armor and a laserpistol You need to add Techguns to your forge workspace by either ...
This is the crash_report which I got from running the TechGuns on 1.7.10Forge10.13.4.1614-1.7.10. In my mod folder, I have Chisel-2.9.5.11 -api, CoFHLib-[1.7.10]1.2.1 ...