Auto Ordnance Model of 1927 A1 .45 ACP Semi-Auto Rifle — Worcester Marked, Finned Barrel with Cutts-Style Compensator
This Auto Ordnance Model of 1927 A1 stands out with Worcester, Massachusetts rollmarks featuring the patent block and bullet logo, plus the correct 'MODEL OF 1927 A1' marking. It captures the classic Thompson profile with a finned barrel, Cutts-style compensator, vertical walnut foregrip, and a top-mounted round knurled actuator. Chambered in .45 ACP and operating via a closed-bolt blowback system, it accepts detachable Thompson stick and drum magazines.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Minimal markings from previous handling/use. Bore is bright and clean.
What's Included
- Auto Ordnance Model of 1927 A1 Worcester Marked semi-automatic rifle
The rifle uses a semi-automatic, closed-bolt blowback action in .45 ACP with a manual safety. Feeding is via detachable magazines, and it accepts Thompson stick and drum patterns. The ejection port is on the right side, and charging is handled by the classic top-mounted actuator with a round knurled charging handle.
The finned barrel is paired with a Cutts-style compensator for the correct Thompson aesthetic and an overall barrel/comp length of approximately 18 inches. Sights are traditional iron: a blade front on the compensator and a protected ladder-style adjustable rear sight.
Walnut furniture completes the package, including a walnut stock with a steel buttplate and bottom sling swivel, a walnut pistol grip, and the signature vertical walnut foregrip with finger grooves. The length of pull measures 17.0 inches.
Factory rollmarks from Worcester, Massachusetts include the patent block and bullet logo, reinforcing its provenance and marking details. The receiver is correctly marked 'MODEL OF 1927 A1,' aligning with the model designation and configuration.




