Yeah, my bet is the integrity/strength of the metal isn't all that great. Kind of like the slide of a Hi-Point.
Well not to disagree but, unless you plan on dropping your pistol on concrete often - zamak-3 , slides are fine for blow-back guns in my opinion. It's an alloy of zinc/aluminum/copper used in many items including automobiles. It won't rust either. I own many such guns & they are all still working fine. This includes two that are over 20 years old.
Zamak-3 is also used by Walther in the P-22, and SIG in the misquito 22LR pistol, and Henry uses it in many of their rifles (housings). So how come no one gripes about them? Hi-Point's are decent guns for the money. When I'm in Wayne Co I will often carry their 45's which are more than accurate for pistol combat ranges. If some sticky fingered badged THUG wants to steal that - so be it.
I won't be crying like I might over losing a Wilson Custom combat, etc...
They are what they are, but they are ok OC pistols and awesome boat/car/nightstand guns. The carbines are also very reliable and accurate in my experiences. They are P+ rated and the barrel is steel just like all other pistols (all be it a thicker barrel than most semi-auto's)
Here's what all my 45's in "Hi-Point" are capable of.