Okay, I’ll do what I can to help (Glad to hear someone like the sound of my work by the way)
You’ll need to get the code of what you want, so get the code from pastebin, but only what you’ll need for one section of code…
Like this:
http://pastebin.com/ZGBhAd82
The above code is for the gun, it goes in the Ranged.json folder, if this has been changed, just let me know, and I’ll crowl out from under my rock of safety…
Then you’ll need the crafting code.
http://pastebin.com/Twfhc3Qy
The above code is for the crafting recipe, and is meant to go into the Recipes.json folder, again if this has changed, it’s my bad.
IMPORTANT, YOU OUGHT TO READ THIS…
To open these folders up, and be able to edit them, you’ll need to use Notepad++, or another software capable of doing it…N++ is the one I use, and I find it very good.