This Old Gun: L2A3 Sterling SMG

by
posted on May 20, 2020
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **

In the aftermath of World War II, the British military sought a replacement for its Sten submachine gun. Sterling Armament Co. was awarded contract for its redesign of a submachine gun engineered by its chief designer George William Patchett, a prototype first seen just prior to the close of World War II and used unofficially during the war.

World War II British soldiers peering down at a Sten gun in a black and white image.


To meet the official contract request, Sterling Armament took the Patchett design and made improvements. The result came to be known as the L2A3 Sterling submachine gun (SMG). The new SMG was chambered in 9x19 mm, featured blowback operation with advanced primer ignition and provided a rate of fire slower than its Sten predecessor, which resulted in an accurate firearm that was easily transportable, thanks to its under-folding collapsible stock.

Exploded-view parts drawing of L2A3 Sterling SMG.


The L2A3 is a lightweight SMG, thanks to the use of a smaller bolt as compared the the Sten, which was backed by a dual mainspring. The lowered bolt mass of the L2A3 meant the gun was more controllable, and the helical-cut grooves along the bolt provided self-cleaning characteristics, which increased the gun’s reliability.

Line drawing and caption of a L2A3 Sterling SMG cutaway of receiver.


A key feature of Sterling’s redesign was a unique magazine assembly that used rollers rather than a standard plate-type follower. This roller design increased the effectiveness of feeding the open-bolt-firing L2A3.

Quartering-view of a man shooting a L2A3 Sterling SMG.


Called to service in 1953, Sterling Armament Co.’s L2A3 went on to serve British troops through the Gulf War and was eventually replaced by the L85A1. Watch our feature segment above from American Rifleman TV to learn more about the L2A3 Sterling SMG.

Text on image stating "I Have This Old Gun L2A3 Sterling SMG."

Latest

Kimber 2K11
Kimber 2K11

Review: Kimber 2K11

The 2011-style pistol was designed to address the capacity limitations of the single-stack M1911 platform, and Kimber's approach to the concept is its 2K11, a competition-ready offering with several notable features.

Favorite Firearms: A High-Flying Hi-Standard “A-D”

Manufactured in New Haven, Conn., in late 1940, this Hi-Standard pistol was shipped as a Model “A,” but a heavier Model “D” barrel was installed later to replace the original, light barrel, leading one American Rifleman reader to call it a Model “A-D.”

Ruger Helps Families In Need Through The Kids & Clays Foundation

In the effort to help tens of thousands of critically ill children and their families across the nation through local Ronald McDonald Houses, Ruger is among some of the industry’s foremost Platinum-level sponsors of The Kids & Clays Foundation.

Unlocking The Future: Smith & Wesson's "No Lock" Revolvers

The future is shaping up to be a good one for fans of Smith & Wesson revolvers. The iconic American company had released 14 new models thus far in 2025 at the time this was written mid-year. And, with one exception, they have all shared a common feature—no internal lock.

The Armed Citizen® Oct. 6, 2025

Read today's "The Armed Citizen" entry for real stories of law-abiding citizens, past and present, who used their firearms to save lives.

FEMA Notes Decline In Disaster Preparedness

A recent report from the Federal Emergency Management Administration (FEMA) noted a decline in local government preparedness for natural disasters, putting increased pressure on individuals to prepare themselves for emergencies.

Interests



Get the best of American Rifleman delivered to your inbox.