They are using Silent on Flight School but they have a "enhanced mod" which was intended for jaymod only installed as well. This is how they are adding the panzer and unlimited ammo with all weapons. This is not recommended by Silent because its unstable, security loopholes, and crashing. I personally would see if it could be done with Lua, or if there is a similar mini-mod that is compatable with Silent. I wonder if the give command would work in a map config? If it did though once you get gibbed you would lose what was given. If I was a brillant coder I would see this as a challenge and my competitive persosonality would take over to try and find a solution.