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

Finnish LMG Foxhole 1939
Finnish LMG Foxhole 1939

Winter Warrior: The Finnish Lahti-Saloranta M/26 LMG

A little-known light machine gun from the inter-war era, the Finnish Lahti-Saloranta M/26 garnered a poor reputation during its service in World War II, but a closer look and some context reveals how innovative it was for its time.

Federal Ammunition Honored By National 4-H Shooting Sports

Federal Ammunition was recently honored with the 2025 4-H Shooting Sports Pioneer Award, which recognizes individuals or companies that have made significant contributions to the 4-H Shooting Sports program at a national level.

I Have This Old Gun: Polish Vis 35 Radom

One of the lesser-known designs from the 1930s, the Vis 35 Radom is widely considered to be one of the best of the pre-World War II handguns.

Rifleman Q&A: Colt 1860 12-Notch Conversion

"At a gun show, I saw a Colt 1860 Army Richards Conversion with 12 cylinder notches instead of the usual six. The dealer was not sure whether this was original to the gun. Were these extra notches a factory variation or just some frontier gunsmith’s backroom project?"

July 2025 Sees Lowest Gun Sales Numbers In Nearly Six Years

Following a nearly six-year, record-setting run, according to the latest NICS and NSSF reports, firearm sales have dropped just slightly below a million during the month of July.

Review: Extar EP9 Carbine

Sporting polymer construction, partial compatibility with America's rifle, a unique bolt assembly and a no-lubricant-required design, American Rifleman staff decided the Extar EP9 Carbine, in 9 mm, deserved closer inspection.

Interests



Get the best of American Rifleman delivered to your inbox.