Originally Posted by Dirty Harry Callahan

He's asking about current production models. (2013 - Present)

Older models are mostly made of steel, save for the PPK/L variant which has a Duraluminum frame.

Current production models are made of some proprietary mystery alloy which Walther won't share because it's a trade secret, but they say that it's nothing like ZAMAK and is "much stronger" than any zinc alloy.
I surmise that it's likely the same aluminum alloy they use for all of their other rimfire replicas.

Current models weigh just slightly less than the all steel models, which is achieved by completely filling in the frame. If you take the grips off or look into the mag well, you'll see that inside the grip frame is essentially just a block of metal with the a narrow space for the magazine.


Walther did this intentionally because they wanted to match the weight/feel of the centerfire models, but personally I think that they would have been better off just making the frame share more or less the same internal dimensions as the centerfire models and marketed the light weight as a feature.