On the new M1A2(Trophy-HV) if you have a bind to “select machine gun” after you press it will keep bouncing from one machine gun to another without returning to the main cannon. I tried on other variants of the M1A1’S and M1A2’s except the V3 as i don’t have it yet and on those it works perfectly fine, after pressing the specific bind button it goes from a machine gun to another but it will still return to the main cannon. Only on the (Trophy-HV) it won’t return to the main cannon.
Just go buy Bmpt-72 and wreck house their nerf was minor so sales can improve, then buy a SU-30 so you can complete the package and wipe the field.