40mm launcher/ammo improvements

[Sergeant_Crunch]

Yeah, I could see it being majorly abused if there was some kind of beaker shell, which is why I would suggest not having them be customizable and just have preloaded shells available, mostly in sec for firefighting/healing/cleaning/actually useful shells, maybe have the THC shells available from a debris field merchant so it doesn't happen every single round and lose it's novelty.