If Giuseppe had no problem sending Jimmy the Parrot to swim with the fishes with a single .22 shot to the head, I'm not entirely sold on the idea that the .22 isn't capable of incapacitating or completely neutralizing a threat. If we can keep 10 rounds well within a 6" target at the typical armed encounter distance, we should be able to keep 10 rounds inside a 6" wide headWell then it's not as good for defensive purposes. And the isn't much need to suppress 22 LR in terms of ear protection, and subsonic ammo is even lower velocity to begin with.
Cool gun, though.
A 6" barrel length is just about as long as you can go and still remain subsonic using typical standard velocity ammo, so I have no need for slower moving ammo.
Firing .22's indoors can still be loud, and even though I'm not particulary sensitive to loud noise having been a welder/fabricator for most of my life, using a suppressor indoors just makes sense.
And thanks, it did turn out to be a pretty cool gun