Firearms

Auto-Ordnance M1A1 Thompson

Specifications

About

Notable Variants

Aftermarket Ecosystem

Historically Significant Examples

Serial Number Data

Production data from factory records and collector research. Year ranges are approximate for pre-1968 firearms.

Years	Serial Range	Count	Factory	Country	Confidence

Further simplified Thompson with fixed firing pin integral to the bolt face, eliminating the separate firing pin and spring. Final Thompson production variant of WWII.

Type: Submachine Gun

Action: Blowback

Caliber: .45 ACP

Capacity: 20

Year introduced: 1942, USA

Weight: 120 oz

Overall length: 32"

Status: Discontinued

Military use: Yes

Intended use: military