I've owned four of the NAA mini-revolvers over the years.
Of those, I hated the smallest ones.
Like you said in the OP, they're not hard-hitting.
And I found that while they "could be" aimed to give decent accuracy with a lot of practice, aiming them was slow.
They didn't point naturally or feel good in my hand.
Except the Black Widow model with the fairly large black rubber grips.
That one had a 2.25" barrel (I think), and real sights. The kind of sights a modern semi-auto pistol would have.
That gun came with a .22LR cylinder AND a .22 WMR cylinder, and it was great.
Cheap practice with long rifle ammo, and then put in the magnums for defense and carry in the street or on the hiking trail.
Love the NAA minis! I've owned several of them and still carry a PUG in my front pocket everywhere I go. Not as a primary carry, but a backup to my Shield. Its so small and lightweight you can't even tell its there.