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

Published on June 18, 2025
Duration: 24:55

This guide details the installation and functional understanding of the Krummlauf, a unique curved barrel attachment for the StG44. Developed by Rheinmetall-Borsig, it featured specialized sighting systems and gas relief ports. Expert Jonathan Ferguson highlights its limited accuracy and short barrel life, making it a niche, experimental accessory primarily for shooting around obstacles or from vehicles.

Quick Summary

The Krummlauf was an experimental WW2 attachment for the StG44, featuring a curved barrel (30° infantry, 90° tank) allowing shots around corners or from AFVs using periscope sights. Developed by Rheinmetall-Borsig with Zeiss optics, it faced challenges like pressure spikes and short barrel life (300-3,000 rounds), with limited accuracy tested to 300 meters.

Chapters

  1. 00:00Introduction to StG44 & Krummlauf
  2. 01:05Purpose and Functionality
  3. 02:45Development History
  4. 05:45Sighting Mechanisms
  5. 10:15Technical Challenges & Performance
  6. 11:30Cultural Impact & Conclusion

Frequently Asked Questions

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

The Krummlauf was designed to allow infantry to shoot around corners or from within armored fighting vehicles (AFVs) using a periscope-like sighting system, effectively extending the shooter's line of sight.

What were the main technical challenges faced during the development of the Krummlauf?

Key challenges included managing the pressure spikes caused by the curved barrel, developing durable sighting systems (evolving from mirrors to prisms), and accepting reduced accuracy and extremely short barrel life.

What were the different versions of the Krummlauf, and who developed them?

Developed by Rheinmetall-Borsig under engineer Bruno Schulz, the Krummlauf came in 30-degree (infantry) and 90-degree (tank) versions, with Zeiss contributing to the optics.

What is the effective range and barrel life of the Krummlauf attachment?

The Krummlauf was tested to an effective range of 300 meters for man-sized targets. Its barrel life was very limited, typically ranging from 300 to 3,000 rounds.

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