Leatherman Rebar is always in my pocket and has 2 blades, pliers, file, tools on it.
Ruger PCC 9mm (takes Glock mags and those aren't exactly scarce).
.22LR, have a CZ 452 Ultra Lux with 28" barrel and sub-sonic ammo through that is quieter than my air rifle.
Remington 870... b/c 12 gauge...