This is an automatic spawning weapon (doesn't require any work to spawn it in your TTT maps), it is currently not purchasable in the detective or traitor shop, although you could modify the .lua file if you would like. If you would like the .lua file, down...

THIS IS NOT A SANDBOX/SINGLE PLAYER ADDON! This content is for TTT servers only (listen and dedicated). None of these weapons will show up in sandbox. TTT doesn't take advantage of all available CS:S guns by default, so this addon takes those unused models...

They were extracted from Ge Source 4.2. Enjoy it! ...