This is a current sight picture of said gun - issue of already thick walls and tiny sight made worse by increased zoom.
In comparison, here are sights for
and
Thus I suggest removing M3 field modification model and replacing it with either of 2 above gun models untill we get a revised gun model (sometime in this millennium, I hope).
Enlisted is in early access and beta and alfa testing, so a “temporary” replacement model should not be a big concern (what’s with the guns being basically the same shit anyway).
At least, this way one and a half premium squads with this gun would become more usable to players, I hope that still is a concern for developers?