re: #3 goddamnedfrank
This reminds me of the pinnacle of US weapon platform technology, the M274 Mule with an M40 recoilless rifle attached. All boom, zero armor, absolutely fractally lethal to everything around it including the crew.
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Also, technically not a technical because these were actually designed to be used this way.
Now put a Davey Crocket nuke on that baby and get ready for FALLOUT: FULDA GAP!
No ghouls but plenty of rad vampires and mutant werewolves to challenge your T-51 power armor skills!