I have a server and I'm not sure were to find minecraft gun mod for 1.7.4 and how can you install more commands on the server?
How to install gun mod and more commands on minecraft server?
Roberto Castaneda
To add commands to a server, you should either have a bukkit/spigot but not vanilla server, then you goto
http://plugins.bukkit.org to get plugins. And here is where you get minecraft gun mod: http://minecraft-mods.org/3d-gun-mod/
Shiu