Why do my guns and thrown weapons not work right?

[SoulStealer]

I made a gun weapon a while ago, i packed it, put it in my add ons folder, and it showed up in the list but not in the wrench menu.Can anyone tell me how this could be fixed?

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[Regulith]

This would probably go in Modification Discussion if you made the weapon yourself.

[Healbadbad]

set the UI name to the item image would be my first guess since we cant see the code