Ack is very well modelled as it is now. Its balanced perfectly. It works pretty well against vulching, and its still possible to Jabo the base. I cant remember when the ack was adjustet but before that it was (allmost) impossible to Jabo the Base. Since it was fixed the gameplay around the bases got much more exiting. You cant make Ack weaker than it is now, that would make it way too easy for a couple of guys to vulch a Base, both in Vehicles and planes.
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GrinBird