It was not until the Lend Lease Act was passed in March 1941 and the addition of the 'US' prefix to the 'Model of 1928' model designation, that Army Inspectors of Ordnance, (AIO), stamps were added to Thompsons. In 1940, when manufacture of the Model of 1928 was resumed, the contract for the production was awarded to the Savage Arms Company. The majority of the Model of 1921s are stamped with his encircled JHB initials. Barrett, who was the based at Hartford, Connecticut, during the production of all the Colt Model of 1921 Thompsons in 19. The first Thompsons produced were marked with the stamp of Auto-Ordnances chief inspector, Major John H. Since the production of the Model of 1921, there have been a number of Inspector stamps added to Thompsons, indicating, not only where it was produced, but also sometimes a clue to the period it was produced. To share this knowledge, with those who are only beginning their addiction to the hobby, I have correlated the information below, which I have researched from many sources. As I have added examples to my collection, I have researched the history and markings on each one, from various sources available. In the event of inaccuracies in the description of an item, we reserve the right to remove the conflicting information once notified.Since I bought my first deactivated Thompson, a Model of 1928, back in 1995, I have always been interested in identifying the marks and stamps found on the Thompsons. Midwest Gun Works reserves the right to edit, change, or clarify pricing, availability or descriptions at any time to correct errors in product listings.Please have your FFL dealer fax their FFL to 63 or email to When sending the FFL to Midwest Gun Works be sure to include the customer name and order number. Please check your State, County, and City laws for restrictions before ordering. It is the responsibility of the purchaser, to check your local laws before ordering products from. Before this product is shipped your FFL Dealer must email or fax a valid FFL to Midwest Gun Works. This item will only ship to a Federal Firearms License Dealer (FFL).

Midwest Gun Works does not accept firearm returns, please contact the manufacturer for all warranty claims.

Our store hours and contact information can be found HERE. If you are placing an order for in store pickup, please email or call ahead of time to confirm pickup time prior to arrival. Firearms will ship separately from any additional items purchased on the same order with no additional shipping charges. Note: This firearm may ship from our regional supplier. Important Firearm Purchasing Information: FEATURES-Brown checkered plastic grips-Matte black finish-5' barrel-Blade front sight-Rear drift sight adjustable for windage-Thumb and grip safety & firing pin block-7-round magazine DIMENSION

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