How Britain Built the Sterling SMG: Archive Film with Intro by firearms expert Jonathan Ferguson

Published on February 11, 2026
Duration: 62:41

This archive film details the intricate manufacturing process of the Sterling submachine gun at the Royal Ordnance Factory Fazakerley. It covers the detailed steps involved in producing key components like the barrel, breech block, casing, and magazine, highlighting specialized machinery and quality control measures. The film concludes with rigorous proof testing and final packing procedures, showcasing the comprehensive approach to producing this iconic firearm.

Quick Summary

The Sterling SMG was manufactured at the Royal Ordnance Factory Fazakerley, indicated by its serial number. The production process involved detailed steps for components like the barrel, breech block, casing, and magazine, utilizing specialized machinery and rigorous quality control measures, culminating in extensive proof testing.

Frequently Asked Questions

Where was the Sterling SMG manufactured?

The Sterling SMG featured in this archive film was manufactured at the Royal Ordnance Factory Fazakerley. The serial number indicates 'EUPNET' for the United Kingdom and 'F' for Fazakerley, with 'L2 A3' denoting the standard model markings.

What are the key stages in Sterling SMG barrel manufacturing?

Barrel manufacturing involves cutting bar stock, forging, heat treatment (hardening and tempering), turning journals, rough and finish turning the profile, deep hole drilling, draw-boring, reaming, and finally broaching the rifling.

How is the Sterling SMG magazine constructed?

The Sterling SMG magazine is an arched design holding 32 rounds. It's formed from two halves of cold-rolled strip, which are then welded together using a fully automatic Skiaki welding machine.

What kind of testing does the Sterling SMG undergo?

The Sterling SMG undergoes rigorous testing, including a proof round fired at higher power to check mechanical soundness. It's also subjected to elevation and depression shooting tests to ensure proper functioning and accuracy, requiring a 4-inch group.

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