MSW-R NV scope, advanced laser sight, flash suppressor and soft point (or nothing) Hipfire king + amazing nv-scope for short range fights.
Just decide if you want the statistically better DPS/hipfire or a bigger magazine. So MSW or Carv. Both have their benefits in CQC. With your faction getting the Repeater, you have the best CQC sidearm available, so magazine size can be negated a bit knowing you can fall back on what is basically a SMG that can easily take out two more people with a single magazine if you do your part. In that case, if I mained TR, I'd use the MSW. For NC and VS, while the pistols aren't that bad, having more ammo in your mag of your primary weapon is more of a benefit because if you pull out your pistol in CQC you're always at a disadvantage against other CQC weaponry. With TR, the Repeater can hold its own.