The “Kordun” (named after a region in Croatia) was the first pistol design from Marko Vukovic, lead designer for IM Metal and later HS Produkt. It was made in 1985 for the Yugoslav Peoples’ Army, with the goal of being a softer-shooting and higher capacity sidearm than the then-standard M57 Tokarev. The Cordon is unusual in being a short recoil, flapper-locked pistol. It is chambered for the 7.62x25mm Tokarev cartridge, with (I believe) a 10-round double stack, single feed magazine. It was indeed a very pleasant pistol to shoot (and a .32 ACP version apparently even nicer), but was rejected by the Yugoslav Army for its complexity and difficult disassembly/reassembly process.
Many thanks to HS Produkt for giving me access to prototypes like this one to film for posterity!