The m1 carbine needs a ROF buff, nothing huge, just like 360 - 380rpm base (or even an rpm upgrade at the very least since every other semi auto gets one except the m1 carbine), to be more competitive with the Type Otsu and even BR III rifles to an extent. The same also applies to the VG 1-5, as it’s in the same boat as well, except questionably worse being BR III.
The armaguerra mod 39 could also do with a buff, with like 30 - 50% less horizontal recoil (it makes the gun almost impossible to use). And while these buffs may not be huge or vastly game changing, they are needed and I feel shouldn’t upset the game balance a lot. It’s about time BR II/III semi auto carbines get the love they deserve.