AFTE Store - Heckler & Koch, Model HK4 Pistol, Additional Outstanding Class Characteristics

This article is written in reference to “Heckler & Koch – Model HK4 Pistol” published in the AFTE Journal, Volume 5, Number 2, April 1973, page 19. This current article describes and sketches additional class characteristics on this pistol. The additional class characteristics described include flute markings on .22 caliber cartridge cases, fins on .22 caliber bullets, and additional breech face marks on both the .22 and .380 A.C.P. cartridge cases.