Lets admin start an "<insert your favourite weapon here> arena" which means that everyone will instantly be given specified weapon, and infinite (optional) ammo for it. By default no other weapons will be visible on ground in game. As long as Weapon Arena is enabled you can't change to any other weapon than the given one, grenades, knife or C4. Upon new round you will be given a new weapon, if you lost your previous... Upon default you will not even have to reload any clips - you will always have bullets to fire! This can be changed with a cvar.
...and more features.
Make sure to have these modules enabled: