I don't have one. I have thought of getting a Kel-tec Sub 2000 in 9mm because it is very compact when folded. It would give added accuracy and some extra umpf to the 9mm, enough for any realistic scenario I can imagine in my area (human predators mostly). Velocity in a +P round would be similar to an M1 carbine in similar weight bullets. Ammo prices would be less.