Unless this is background for your own campaign (if so go for it) consider purchasing the Project files "Bullets and Bluegrass" and "Fallback!" directly from Timeline limited. Contained is the current status of the KFS and how it is equipped.
CATALOG
It really appears that the KFS at the intial awakening of the Rich Five and their minions the Two Thousand was lightly armed and armored with the Mini-14 rifle, Ameli LMGs, M59 pistol, and the V-300. The artillery and heavy armor came from looting National Guard and active Units or absorbing their survivors. The P-47 Thunderbolt is a later addition once re-engineered from one or two taken from an aviation museum.
Seeing as all of this is 1970s tech and the 4th edition is getting a technological makeover, it stands to reason (IMHO) that the enemies of the Project should get one too.
This and there are gaps in capability and deployed systems by the KFS that can be addressed in this thread.
Seems like the KFS should have at minimum AN/PVS-5 goggles down to the squad leader level for night operations. AN/PVS-7s for the Praetorians. As an example where something is missing.
A real breakdown of the Military and Internal Security structures would be nice to know (Order of Battle) too.