Of course he lives in a compound. All gun owners do. And they always have a frightening or alarming arsenal. And their high-powered assault pistols can all shoot two or three miles. At least. And they have hundreds of rounds of ammunition. Like, maybe, 3 boxes of .22LR...
This guy may well be an arsehole, but that fact (if true), has no bearing on what is included in RKBA. And cannon are definitely included. Always have been. Check out Knob Creek some time...
So, would my truck be considered a mobile compoud/arsenal? Or would that be restricted to mobile homes?