Pay $100 more and either get a Bersa Thunder .22 which is all steel, or pay around $125-150 more for a Walther PPK/S .22 which is not in fact ZAMAK, Walther Germany clarified that it is constructed of a proprietary alloy which they claim is "much stronger than ZAMAK" and Walther USA no longer classifies it as "zinc diecast" at all on their website either, but haters continue to perpetuate this mistake because it makes it easier to justify their insipid elitist rhetoric.
Either way, it's worth it to pay more for the Bersa Thunder .22 or Walther PPK/S .22, because regardless of what snobs may insist about their supposed lack of quality, both of which tend to work and have a total of zero reported cases of their slides nor frames cracking, not even after withstanding the sort of catastrophic ammo failure which has sent many a P22 to the scrap yard.
Heck, even if you're dead set on getting a $125 .22 handgun, then get a Heritage Arms Rough Rider.