I ccw a Glock M42 in a Desanta pocket holster (right front pocket) as a "Backup/Second gun". Takes up very little room or bulk. Sometimes depending on dress mode it is a "Primary". I practice facial and crotch shots up to 21 feet. At 50 feet all shots in the kill area of a B-27 target.
Flawless function if kept lub the first 100 rounds.
I use Perfecta .380 FMJ ammo