Firearms expert Jonathan Ferguson of the Royal Armouries details the Krummlauf, an experimental curved barrel attachment for the StG44. Developed by Rheinmetall-Borsig, it aimed to enable shooting around obstacles or from vehicles via periscope. Despite technical challenges like limited barrel life and sighting system durability, it represented a unique German wartime innovation.
The German 5cm Le GrW 36 light mortar, designed by Rheinmetall-Borsig, was intended as a portable infantry support weapon but suffered from excessive weight (14kg) and complexity. Its 'closed bolt' firing mechanism, intricate leveling system, and two-piece disassembly for transport highlighted design flaws. By mid-war, its impracticality led to it being replaced and relegated to static defenses.
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