[Request] Toggleable Weapon Damage Modifier

I was wondering if anyone could create a script that allows people to do /airsoft and toggle a weapon damage modifier on ALL of their weapons they use to next to nothing, thus creating Air Soft Weapons with ANY gun.

Doing this will allow easy communication that, yes it is a airsoft gun because it only stings, it doesnt hurt.

If it is possible to change the sound that the guns make to the suppressed variant without needing the suppressor on it would also be nice.

I have next to no experience with LUA or any other language that this is possible in.
I do have a somewhat experienced LUA developer that is a bit rusty, and if anyone can provide ideas for him to accomplish it that would also work.