Originally Posted by FreedomFighter69
The Walther P-22, or Sig Mosquito serve that purpose as well.
Neither of these feels much like a "real" gun - and I own both. The best "simulator" .22 available is one of the Sig P series guns. These are "real" Sigs and you can also buy the appropriate centerfire kit so you can have the best of both worlds. Get a P229 in .22 now and add the 9mm kit later and you have a great dual caliber platform.
For a dedicated .22, I'd suggest a Ruger 22/45...