ALL my several Brno Model 21 and 22, early postwar sporting rifles as by couple of ZG47 rifles are most definitely small ring defined as of smooth, non-stepped sidewall with "step" to larger ring. These receivers were Not end of war surplus Reich era production. All of the bolts of a strictly commercial fashion "flat carbine" descriptor style. Should anyone doubt my information, I can furnish a few file photos! These rifles collectively were dated from 1947 into 1951.
As for Parker Hale, no commentary as 'none' under my watch.
Best!
John
