Manufactured by Auto-Ordnance on contract from the United States Government, the Thompson 1928A1 is one of the signature American weapons of World War II, being deployed in every theater of the war, both in American hands and among numerous Allied units via equipment sharing and Lend-Lease supplies. The 1928A1 is still very close in overall fit and features to the original Roaring 20s/Great Depression "Chicago Typewriter" of gang warfare fame, retaining a number of options that would be eliminated from later production to lower cost and speed production. A number are believed to have been released to civilian and law enforcement buyers, having been left over after the military transitioned to the simplified M1 pattern Thompson. A blade front sight is installed on the Cutts compensator, with a Lyman folding ladder rear sight on the receiver. The barrel retains the cooling fins, with a military pattern straight handgrip. Commercial standard markings are present on the top and sides of the receiver, with the "US MODEL 1928A1" marking on the left side of the receiver along with "RLB", "GEG" and "flaming bomb" inspection marks. The trigger group is unnumbered, with "FULL AUTO"/"SINGLE" selector lever and "FIRE"/"SAFE" safety lever, a grooved pistol grip, and a quick detach buttstock with trapdoor buttplate and a tan canvas "Nobuckl" sling. The bolt assembly is blued, with the lugs removed from the Blish lock; this was a transitional step in the U.S. Thompson's evolution, and the lock would be eliminated entirely in later contract SMGs. A "U" marked Auto-Ordnance "L" type 50-round drum magazine is included.

Fine, with 95% of the reblued finish. Beneath the bluing is a number of polishing marks and shallow pits, and some minor spotting is present on top of the blue. The wood is good, with mild dents and sanding. Mechanically very good. NOTE: This weapon is a National Firearms Act (NFA), fully transferable Class 3, which is registered with the Bureau of Alcohol, Tobacco, Firearms and Explosives, (BATFE) that is classified as a "Curios or Relic" as defined in 27 CFR, 478.11. These weapons are still subject to the provisions of 18 U.S.C. Chapter 44 and 27 CFR part 478.