WW2 Assault Rifle with a Curved Barrel? The Krummlauf with firearms expert Jonathan Ferguson

Published on June 18, 2025
Duration: 24:55

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.

Quick Summary

The Krummlauf was an experimental curved barrel attachment for the WW2 StG44 assault rifle, designed by Rheinmetall-Borsig to enable shooting around corners or from armored vehicles using a periscope. It featured gas relief ports and evolved sighting systems, though barrel life and accuracy were limited.

Chapters

  1. 00:00Introduction: StG44 & Krummlauf
  2. 01:05Purpose: Shooting Around Corners
  3. 02:45Development History & Versions
  4. 05:45Sighting Mechanisms: Mirrors vs. Prisms
  5. 10:15Technical Challenges & Performance
  6. 11:30Cultural Impact & Conclusion

Frequently Asked Questions

What was the purpose of the Krummlauf attachment for the StG44?

The Krummlauf was designed to allow soldiers to fire weapons around corners or from within armored fighting vehicles. It utilized a periscope system for aiming, enabling engagement of targets without direct line of sight.

Who developed the Krummlauf and when?

The Krummlauf was developed in Germany during World War II, primarily by Rheinmetall-Borsig under engineer Bruno Schulz. Hitler ordered 10,000 units for infantry use in August 1944, despite the design being in early stages.

What were the main technical challenges with the Krummlauf?

Key challenges included managing pressure spikes due to the curved barrel, requiring gas relief ports. Sighting systems evolved from fragile mirrors to heavier prisms. Barrel life was also limited, ranging from a few hundred to 3,000 rounds.

What were the different versions of the Krummlauf?

Two main versions were developed: a 30-degree curved barrel primarily for infantry use, and a 90-degree version intended for use with tanks and armored vehicles.

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