Bumping this to the top in case anyone has had any recent experience.
I'm currently trying to decide between a Glock 17 and a reconditioned Sig 229. One of the things I'm considering along with the purchase of the gun itself is eventually getting a 22LR conversion kit for some extended duration practice. The conversion for the Glock is reasonably priced, but for the Sig it's outrageous; I'd be better off just getting a the Sig and a separate 22.
If the AA 22LR conversion is well made and worth the money, I'll simply get the Glock and the AA. I'm not concerned with putting the extra wear and tear on whichever gun I get, as the 1911 will be doing the dirty work, if it ever comes to that.