they look like they fit nice in pocket. very smooth edges and maybe that was the thot in design
Oddly enough, the PK was .32 caliber, used by police and the PPK .380 a favorite of Nazi party wheels.
You might look at the Kel Tec 9 mms and Ruger LC9, or the even smaller LCP if you like that caliber. I have a Beretta Tomcat .32 I like very much, DA/SA.
Or the Springfield XDS in 9 mm. The trigger on the Walther is circa 1944. Otherwise a classic piece, but heavy.