I dont think
the Mallers, with their looted weapons from
Burt's shop and what they have found laying around, would be in any shape to attack Ft. Irwin. That would be a stupid, futilie move, that would no doubt cost all them their lives. Wasn't it mentioned that Irwin has like 2,000 troops or so? It would take a simple radio call to the "box" and whatever is out training would roll up and squish the mallers. I'm thinking a rag-tag group of what, 30 or so criminals, has more sense then to attack a military base.
Just my $.02 though