[Beskar Baron]

one of the terror trains (if not both) is also pretty bad for smg ammo

Crummy is REALLY bad on ALL ammo types, with, so far as i know, the spawn loot pile, the tester room ammo for deagles and pistols (and maybe something else) and the gun shop boxes being the only major spawns (outside of the rifle ammoboxes next to the rifles on the lower catwalk) to the best of my knowledge. The spawn pile and maybe the gun shop are the only ones that have smg ammo. even looting smg ammo from ground guns is iffy, as the major spawn pile for smg's also spawns m16's and pistols more often than not