I dunno if its useful to you or not, but if you cover the map with big colliders all the way without leaving any spaces, most weapons will be rendered useless. including the chainsaw ^_^. (something like
this)
This way, it might be possible to put it in regular servers without bothering whether the weapons will affect the boxing gameplay. Other stuff i've noticed:
-Desert eagles can kill at point-blank. But being at point blank is almost equilivant to boxing, so, ah well...
-Knives won't cause damage when thrown, but they are still very deadly at point-blank.
-Mk79 and LAW will explode in your face when you use them. you need to be standing ON your target to harm him with the blast. -_-
-Grenades would explode a very short distance infront of the player, a little farther then what a mk79 or law would cause. the explosion causes some harm to both sides too. Maybe you can treat it as some super-move as in those in fighter games? ^_^;;
-bots with weapons start to act weird. Not that most frequented servers uses bots.
-The floor may be too thin to stop explosions from blasting players thru it. you will need to thicken it.
If this is implemented, maybe we'll see more of it in rotations of DM servers? since they don't need to change their server options. but the decision still lies with you, the mapmaker~
anyhow, its still wicked fun :)