[sNeeP]

Removed

[Zalaxy]

Is this the clip size you're wanting? If so you can do this by editing you're cfg's. No plugin is needed. You can even change the damage each shot does, what happens at longer ranges(rifle shoots through zombies?) etc.

[Juan Handsock]

I've had a similar problem, so what I did was edit the scripts, then so sv_consistency 0. The clients won't have the script files though, so weird bugs will occur if they try to reload and their clients wont predict shots correctly. If you're only editing ammo, it's not too big a deal. People will be able to use custom models though.