The URZ (Universal Hand Weapon) was a Czech prototype modular weapon system designed by Jiri Cermak, intended to be configurable as various firearms from rifles to machine guns. It featured a unique roller-delayed blowback action and a mechanically actuated 50-round belt-fed drum. Despite its innovative design, the project was canceled in 1970 with only nine units produced, likely due to political or economic factors.
The URZ, a rare Czech prototype, showcases a unique roller-delayed blowback action distinct from common HK designs. It features an innovative dual-purpose drum and belt box feed system with mechanical cartridge feeding via cam tracks in the bolt carrier. Only nine examples were ever manufactured, highlighting its experimental nature and historical significance in Cold War firearms development.
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