The velocity of .45 ACP rounds is insufficient to take down enemies beyond a certain range, and as a weapon in BRIV, the M1921/28 is no match for the Danuvia 39M. The M1928A1 in BRIII does not qualify as a proper BRIII weapon, whether in terms of rate of fire or bullet spread. Given that BRIV already features a 50-round version of the M1928A1, the M1921/28 should be moved to BRIII.
That remark merely serves to highlight your arrogance; it does nothing to alter the fact that .45 ACP bullets are slow.
You can’t compare submachine guns with assault rifles. If you want to do that, then assault engineers and drivers should be able to carry assault rifles—so why isn’t that actually the case?
Assault engineers can carry assault rifles. That’s the only thing that differentiates them from normal Engineers, aside from dedicated assault engineer squads without specialists.
You are ignoring the fact that all .45 ACP SMGs do 8.2 damage per shot compared to 7.9 for the Kiraly/Danuvia and 6.8 for all 9mm SMGs. And literally all other stats of the M21/28 like the 0.5 second faster reload, lower recoil and 0.12 lower dispersion.
The .45 caliber bullet has a very slow speed and poor damage drop-off, which makes it basically impossible for him to fight at medium to long range, unlike submachine guns of other calibers.
And the M21/28 has a better reload, less dispersion, less recoil, less visual recoil and less weight. Both have areas they’re better in than the other and both belong at BR4
These are all minor advantages, and the poor bullet speed of the .45 caliber can offset all these advantages, and in actual combat, the spread of all .45 caliber weapons is not as good as described in the introduction.