[cbk1994]

Generally I prefer to handle that stuff serverside because it's a lot more reliable (i.e. trigger serverside with the attack position, then find out what players have been hit and trigger clientside for them letting them know they've been hit).

Your other main option is to do a trigger like devilsknite1 showed above. It will call onActionWhatever (where "whatever" is the action type) in every clientside weapon that player has.