Fun With OOBs: An Austen MkII at the Range

Published on November 19, 2020
Duration: 1:49

This video details a range test of the Austen MkII submachine gun, highlighting significant reliability issues including a dangerous out-of-battery (OOB) discharge. The firearm experienced malfunctions in semi-auto and full-auto modes, necessitating an early end to the session. The content emphasizes the mechanics of OOB events and shooter safety precautions.

Quick Summary

An out-of-battery (OOB) discharge occurs when a firearm fires a cartridge that is only partially chambered. On blowback-operated guns like the Austen MkII, this can redirect gas and debris towards the shooter, making hand placement away from the ejection port crucial for safety.

Chapters

  1. 00:00Introduction to the Austen MkII
  2. 00:21Semi-Auto Firing and Malfunctions
  3. 00:46Full-Auto Firing and Out-of-Battery Discharge
  4. 01:01Explaining Out-of-Battery Discharges
  5. 01:25Conclusion and Range Safety

Frequently Asked Questions

What is an out-of-battery (OOB) discharge in a firearm?

An out-of-battery discharge happens when a gun fires while the cartridge is not fully seated in the chamber. This is particularly concerning in blowback-operated firearms like the Austen MkII, as it can redirect gas and debris towards the shooter.

What safety precautions should be taken during an out-of-battery discharge?

While OOB discharges can be alarming, they are often manageable if the shooter's hands are kept clear of the ejection port. Observing smoke from the side of the receiver, rather than the muzzle, is a key indicator of an OOB event.

What issues were observed with the Austen MkII during the range test?

The Austen MkII experienced significant reliability problems, including a round stuck in the chamber during semi-automatic fire and a dangerous out-of-battery discharge during full-auto bursts. These issues led to the early termination of the range session.

What is the significance of the Austen MkII being an Australian military firearm?

The Austen MkII is a submachine gun developed in Australia during World War II, intended as a domestic alternative to the British Sten gun. It represents a unique piece of Commonwealth military firearm history.

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