Is it possible to download the toybox weapons?

So i downloaded a toybox weapon (the spas12), but there are some things i dont like about it. Is it possible for me to download the weapon and install it to gmod(so i can use it offline) and edit it to my liking(for personal use, not for uploading)

I just wanted to edit the sounds, the model a little bit, remove the text whenever i choose the gun and change the ammo indicator.

Thanks!