@SVND0WN wrote:For close-close range, I will tell you a secret: the M5A3 with close combat mags and short barrel. It has 910 ROF with 45 firepower, plus two UBGL options, and a 40 rounder standard mag to swap if you run out of close combat. It has every good optic available as well. It has the STNR laser and BCG grip for whatever close range flavor you prefer if you don't want to use the UBGLs. It's honestly wild how good this gun is at close range. It has SMG rate of fire with AR firepower and range. It's better than every actual SMG and even the "SMG config" BSV-M. The only reason to even use an SMG over it is for mag capacity, imo, but even then, why? You could have an SMG equivalent with higher firepower and UBGLs. The MTAR also used to be this good and essentially was the same thing, 50 firepower with 900 ROF, but sadly it was nerfed and lacks the attachment selection the M5A3 has. MTAR is still a quite good option for exclusively close range though.
Another reason to pick an SMG-like assault rifle over actual SMG for close/mid range is the headshot multiplier that favors AR's. And if you use the AR with an assault class specialist you also get an additional magazine of ammo.
Honorable mention in this specific category next to the M5A3 is the AM40 which on short/mid range can really hold its own vs SMG's