APC or not ?

[plloyd1010]

None are APC's. As they are all transports, their loses in non-assault combat would not step losses to combat units when called for by X results.
Kubelwagens and Jeep MG's are armed trucks. Being unarmed transport they would take a hit on an X result.
The KMS is more like the SK7. It would take a morale check on an X result and be killed on a 2X result.

For my part, I don't think Jeep MG's and Jeep .50 should be able to transport any units. I don't think there is enough room after a driver, gunner and (quite probably) an assistant.

Could/should a jeep MG or Jeep .50 transport light artillery?  Perhaps a small antitank gun or AA gun?

They shouldn't. They are already partly loaded, and again, not much space. That said, the game system as written treats them as regular jeeps. Think of it sort of like considering an M6 as having transport capacity. Isn't it a ¾-ton truck?

The kubelwagens are different in my mind because I don't think they have a heavy weapon mount and gun crew.