I have made some comments before about how the FG42 has better sights over the FG42 II and how this makes it easier to use the first FG in single fire mode, while the second has much easier to control recoil in full auto. So to speak are the rather “bad” sights on the FG42 II no real problem for the weapon if used in full auto.
The M2 Carbine however has much worse sights, and since you need multiple rounds to kill your target, you need to be able to stay on target during your bursts - which is the problem - once you start firing you completely lose your sight picture.
Its just very bad for no reason, the M2 doesn’t even have insane performance to begin with, so why this limitation?