You forgot the M16 (or prone to jamming SCAR) and spare 5.56mm ammo clips (I prefer them to the AK47 because of the accuracy, subsequent grouping and range).
If the next gen carbine comes out, the M5, with the new 6.5mm Grendel rounds, especially, with computer assisted targeting -- I'd pick that.
Many like the AK47 because it's durable and packs added stopping power with 7.62mm rounds and extra magazines. This is perhaps the most "bang" for your buck as it's tried and tested.
Some like bullpups such as the Tavor, but I worry because of the bad grouping during sustained hip fire. I'd even settle for a sub machine gun such as a Uzi or H&K's MP5 or the newer MP7 if they hopefully get better bullets.
Or at least carry some kind of handgun which you can conceal -- Ruger does a good job at this. I'd go for the Ruger LCR (revolver) 9mm because I'll prefer to hide my gun or Ruger LC9S.
I dunno, maybe I'll just get a Glock 17 or another variant such as Glock 18 automatic or 19 or 19x or 35 at 9mm.