Garry's Mod

Garry's Mod

Murder
How do i add a custom magnum for a donator/i just got the server and have a couple other questions
so, i got a nfo server, loaded murder on, got some maps, it all works fine. BUT i am adding a donation system, and would like it so a donator gets a crossbow that fires 25% faster then the magnum, i did that i have the crossbow, but i dont know how to make it donor only and remove other regular magnum, and also i dont even seem to have bystander with gun, but this may be because ive only tried with bots and that breaks my game lol, if anyone could anwser this please do