Prototype Silenced Sten for Paratroops: the Mk4(S)

Published on March 24, 2023
Duration: 11:22

This guide details the disassembly of the rare Sten Mk4(S) prototype submachine gun, focusing on its unique features for paratrooper use. It covers removing the suppressor, barrel, and internal components, highlighting modifications like the shortened receiver, lighter bolt, and compressed fire control group. Expert analysis from Ian McCollum provides historical context and technical insights into this seldom-seen firearm.

Quick Summary

The Sten Mk4(S) was a rare 1943-1944 British prototype suppressed submachine gun for paratroopers, featuring a compact design with a 3-inch vented barrel for subsonic velocity, a lightened 17 oz bolt, and a folding stock. Despite its innovative features, its ergonomics were flawed, and it never saw combat, with most units destroyed.

Chapters

  1. 00:00Introduction to the Sten Mk4(S)
  2. 01:12Stock and Ergonomics Analysis
  3. 02:23Suppressor and Barrel Assembly Details
  4. 04:12Receiver and Fire Control Comparison
  5. 06:16Internal Components: Bolt and Spring
  6. 09:08Historical Context and Rarity

Frequently Asked Questions

What was the purpose of the Sten Mk4(S) prototype?

The Sten Mk4(S) was a rare prototype suppressed submachine gun developed in 1943-1944 specifically for British paratroopers, designed for compact airborne operations with a folding stock and integrated suppressor.

What are the key technical features of the Sten Mk4(S)?

It features a very short 3-inch barrel with six vent holes to achieve subsonic velocity, a lightened 17 oz bolt, a compressed fire control group, and a folding metal strap stock, all housed in a shortened receiver.

Why is the Sten Mk4(S) considered rare?

Approximately 2,000 units were made across sub-variants, but they never saw combat and most were subsequently destroyed, making surviving examples exceptionally rare and historically significant.

What were the ergonomic drawbacks of the Sten Mk4(S)?

The primary ergonomic issue identified was the under-folding metal strap stock, which lacked a proper cheek weld, leading to a 'terrible' user experience despite improvements in the pistol grip over standard Stens.

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