Surplus armor in T2K

[kota1342000]

That's true with the rubber tracks, but if you were building APCs like that out of other vehicles, it would probably be much easier to find surplus wheels and tires as opposed to finding or making the rubber tracks. I know lots of snocats and off-road tracked dump trucks use rubber tracks, but those aren't very common.
I had thought about using the Mk19 for main armament but I bet the 19s are more useful for ring mounts and technicals.
But on that note, I was thinking about the 60mm Brandt breech loading mortar that the French developed. I was wondering if it would be easier to build some kind of single shot breech loading 60mm gun/mortar as opposed to milling an entire new gun barrel for a demilled gun or starting from scratch. What does everyone think? (That's with several small motorshops, at least one small steel mill, and a large mechanical shop, all Gen. Pain's stats)