why is this in gmod

holy crap thank you i've been looking for this for years and it's been right under my nose this entire time

I don't know why it would randomly stop working, but I would try putting the .vpk in your /custom/ folder to see if that fixes things. You'll find it somewhere like Steam/steamapps/workshop/content/ , in the subfolder 362890/2633043761 .

sometimes the addon stops working, why?

Finally i don't have to have anxiety because the mp5 didn't look anything like the mp5 in half-life 1

So, i did the method i used for your shotgun addon, and yes, it also works with this one.

This addon just randomly disables itself. Is there any way to fix it, perhaps the method used with the shotgun addon?

Thank. You.