The Sneaky Silent Sten MkII(S) at the Range

Published on November 6, 2021
Duration: 6:06

This guide details the testing and operational considerations for the rare Sten MkII(S) suppressed submachine gun, drawing on expert insights from Ian McCollum of Forgotten Weapons. It covers understanding its historical context, potential mechanical issues with modern ammunition, and the effectiveness of its unique suppressor design when using both standard and subsonic 9mm rounds. The importance of safe testing practices and avoiding suppressor damage through sustained full-auto fire is emphasized.

Quick Summary

The Sten MkII(S) is a rare, suppressed World War II submachine gun featuring an integral suppressor with a baffle and wire mesh design. Expert analysis highlights its impressive quietness, often making the bolt cycling noise more audible than the shot. Safety is paramount, as modern ammunition can cause 'runaway' full-auto fire; testing with small magazine loads is advised.

Chapters

  1. 00:00Introduction Skit
  2. 00:26Sten MkII(S) Overview
  3. 01:01Mechanical Challenges and Safety
  4. 01:41Shooting 115gr Supersonic Ammo
  5. 02:56Subsonic Ammo Experiment
  6. 04:27Operational History and Conclusion

Frequently Asked Questions

What makes the Sten MkII(S) unique among suppressed submachine guns?

The Sten MkII(S) is exceptionally rare and notable for its integrated suppressor, which uses a baffle and wire mesh system rather than traditional wipes. This design allows it to achieve remarkable quietness, often making the mechanical action louder than the gunshot itself.

What safety precautions are necessary when testing a Sten MkII(S) with modern ammunition?

Vintage submachine guns like the Sten MkII(S) can experience 'runaway' full-auto fire with modern ammunition due to differing bolt and spring balances. It is crucial to test with small magazine loads to ensure control and safety.

How effective is the Sten MkII(S) suppressor, and what ammunition types were tested?

The 80-year-old suppressor design on the Sten MkII(S) proved impressive, particularly with 158-grain subsonic 9mm rounds. Testing also included standard 115-grain 9mm ammunition, demonstrating the barrel's gas-bleed system for velocity reduction.

Why was full-auto fire discouraged on the Sten MkII(S)?

Sustained full-auto fire was discouraged to prevent damage to the Sten MkII(S)'s integral suppressor. Historically, armorers would often remove the suppressor cores during training to preserve them.

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