And the post war P38/P1 with aluminum frames had problems with cracking too. So much so they had to introduce the reinforced cross frame hex bolt...
Also, just realized this model is pretty much identical to what I used to own, except mine was marked just Erma, and this one is designed by Erma but made in the US?
I talked to other people who owned this type of pistol at the time I broke mine and they said it will be fine if you use regular or lower power .22LR in it. I just made the mistake of using high velocity food.
Really thinking of buying another one of these pistols. It was super fun and accurate! Looked great beside my matching byf43 P38 too, and much cheaper to shoot. Though sadly with the short barrel, still very loud to shoot even in .22LR.