Where are the textures and models for the gravity gun located?

So i’m currently trying to make my own gravity gun model for GMOD but I can’t locate the gravity gun model/textures so I can make a GMA and upload it to the workshop.

models/weapons/w_Physics.mdl – World model
models/weapons/v_Physics.mdl – View model

Ok I found the texture file names too but the problem i’m having now is that it’s texture is missing for some reason and it thinks it’s a prop and it doesn’t actually replace the gravity gun.