The Auto-Ordnance Thompson 100-round drum magazine is a factory-style replacement designed for .45 ACP Thompson long guns. It provides a 100-round capacity in a blued steel drum and ships with a drum installation device. The drum measures 8.75 inches in diameter and is manufactured in the U.S. to original-specification dimensions. It is intended for 1927-A1 Thompson models and modern Thompson rifles made in Worcester, MA; it will not fit Thompson M1 models or certain earlier West Hurley/pre-1990 productions.
Key Specifications
- Caliber: .45 ACP.
- Capacity: 100 rounds.
- Compatibility: Designed to fit 1927-A1 Thompson models and modern Thompson rifles made in Worcester, MA.
- Finish: Blued steel.
- Material: Steel.
- Diameter: 8.75 inches.
- Includes: Drum installation device.
- Weight: 3.7 (unit not specified in source data).
- Country of Origin: US.
- Product Type: Drum magazine.
Built to original specifications, this drum magazine offers an authentic appearance and extended capacity for compatible Thompson long guns. Its blued steel construction and included installation tool make it a practical choice for collectors and users seeking a correct replacement or period-style accessory for 1927-A1 and Worcester-made Thompson rifles where legally permitted.
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