Drawing inspiration from the British STEN gun, the M3 was developed as a high-speed, low-cost substitute for the Thompson family of submachine guns. While lacking the aesthetic charm of the Thompson, the M3 was a serviceable weapon, and would be America's go-to SMG through World War II and following conflicts. Blade front and peep rear sights, model nomenclature and Guide Lamp markings on the left side of the magazine well, oiler slot (empty) on the left side of the trigger group cover, the early pattern cocking handle on the right, the combination dust cover and safety on top and a two-position telescoping buttstock. Four extra magazines and a tan canvas sling is included.

Very fine, with 95% plus professionally restored parkerization, with a few patches of shallow pitting below the finish on the receiver and mild handling marks overall. The barrel catch is loose, otherwise mechanically excellent. 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.