Skin not showing

Hey everyone,I’ve converted an m4 skin The Howl from sandbox to my TTT server and i’ve set the dmg magazine size and fire rate to my preference i can spawn the gun using the ulx command ent and equip it the gun is exactly how i want it to be, However it has the m4a1 vanilla skin on it, i was wondering if it was possible in anyway to make it appear as the skin i could see in sandbox,Thanks for reading have a wonderful day.

Did you upload the howl model to your ttt server?

I only converted the swep,Can you link me a way/tutorial to upload the model to the server please ?
Thanks.