Actually judging by feedback comments the Walther I would avoid, tho supposedly they have sorted what was put down to mag issues. I think in most cases anyways, .22 semi's thrive way better on HV ammo or better.
You all can laugh if you want, Im using my mosquito as my primary carry.
Enigma - no laugh here!! I do not obviously suggest .22 as primary in most cases, rimfire and all that but hey - if you are restricted in your choice then go for it - no doubt whatsoever - any gun better than no gun that's for sure.
Mike - sorry to hear an LED has gone phut - others brighter, hmmm I reckon because now they can draw more current - which may compromize them quicker. However, at the priuce of the conversion it's not a huge cash loss. Mine lives in truck now so not used a whole lot but still running on all cylinders!!