Cant add custom SWEP to my TTT Server

My friend made a custom SWEP for my TTT server for the traitor but i have no idea how i would add it :confused:

Any help please

Dump your lua files for the weapon into
[Server or SRCDS]\orangebox\garrysmod\gamemodes errortown\entities\weapons[Weapon Name]
Then change map, that should be it

You may need to copy a new cache to your fastdl, if you’re using one

Well it contains all of these

Also i don’t think he made it for TTT specifically… So what would i need to add