Video: M1A1 Thompson Submachine Gun

by
posted on February 26, 2016
** 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. **
The U.S.-made Thompson Submachine Gun was developed by Gen. John T. Thompson, who envisioned a "one-man, hand-held machine gun" in .45 ACP for use in the ongoing trench warfare of World War I. But the war ended before prototypes could be shipped to Europe. At the start of World War II, the Thompson was the only submachine gun commercially available to the Allies. But the guns were expensive to make. Savage and Auto-Ornance simplified the gun inside and out and made it cheaper and faster to make. The result was the M1 and later the M1A1 Thompson. It turns out the "Blish principle of metallic adhesion" didn't really matter.

To learn more about the iconic Thompson M1A1 Submachine Gun, watch this "I Have This Old Gun" segment from a recent episode of American Rifleman TV.

Latest

Franchi Momentum MULE rifle
Franchi Momentum MULE rifle

New for 2026: Franchi Momentum Mule Rifle

Franchi’s do-it-all MULE rifle is designed as a general-purpose carbine.

New for 2026: Smith & Wesson Spec Series M&P9 and R Handguns

Smith & Wesson expands its Spec series with the Spec Series IV M&P9 M2.0 Metal Compact pistol and the Spec Series R revolver.

New for 2026: Henry Provider and Protector Rifles

For 2026, Henry adds two new product families, one designed for hunting, the other for protection.

Gun Of The Week: Daniel Defense DDPCC 9 mm Carbine

Daniel Defense's pistol-caliber carbine, the DDPCC, offers AR-15-style operation in a more budget-friendly caliber.

The Armed Citizen® Jan. 23, 2026

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

New for 2026: Stoeger STR-45 Combat Pistol

For 2026, Stoeger adds the .45 ACP chambering to its Combat line of STR handguns.

Interests



Get the best of American Rifleman delivered to your inbox.