Isn't it weird that the M16 fires all 4 guns with "fire primary" but the wirble doesn't? Or is this normal and I don't understand it because I'm not a Gv'er.
I guess that's because the M16 did fire all MG at once.
The Wirbelwind gunner had two pedals, on triggering 2 barrels each. He could choose to fire them all together, or alternating for longer sustained fire (giving the two loaders the opportunity to reload one gun each while the other gun was firing)