Stopped at the LGS today, saw they had several of the Walther made 22 pistols, 2 were Walther P22s, one the target model, the other the shorter compact, also had the Ruger SR22, tho is still walther, and a S&W M&P in 22. Thought maybe S&W makes them, but apparently not, seems your buying walther no matter what. I have read the Walther is a bit picky about ammo, as in it likes the high velocity stuff, and had jamming issues early on. Heard the same things about the Ruger version. Already have a S&W shield, but guess doesn't matter if they don't make it. The striker S&W seemed to have the best trigger of the bunch. The walther even in single action was long and spongy.
They are all roughly the same price. But not interested in any if their picky about ammo, especially subsonic.