Five Seven has a big enough clip as it is. Suppress or Dual wield it. Tac benefits from either fast or extended mag + long barrel or silencer for quiet classes. Or just long barrel if you're good enough / your class permits. B23 I use either long barrel or silencer. KAP pretty much needs the extended clip or dual wield and we all know the executioner is a special case altogether and should be set up class-specifically. Also I like what the tactical knife does to the aiming process for pistols. I never knife people but would still like to run with the tac. knife on pistols if points allow.
It's a good setup for all of them, but not necessarily the best. The Five-Seven could go suppressed or dual-wielded, while the Tac-45 and KAP-40 usually like Extended Clip over Fast Mags. B23R is still broken as f*** while dual-wielded. The Executioner is the only one (IMO) where that's the overall best setup, but that gun is bad no matter what you try to do.
Long Barrel is always a good option, Dual Wield buffs the Semis and B23 completely and gives you a trade off on the KAP40 while nerfing the Executioner, Extended Mags are extremely helpful on the .45 and the KAP40, Fast Mags is almost a must on the Executioner. 5-7 is most likely to get the Silencer if I'm using it, or Extended Mags if its one of the few classes I have without Scavenger.
And so begins a tale of vengeance and betrayal. Destiny by sinner sought. Tragedy by power wrought. Valkyrie Profile: Covenant of the Plume.