Drawing inspiration from the British STEN gun, the M3 was developed as a high-speed, low-cost substitute for the Thompson family of sub-machine 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 stored 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. Magazine absent. A number of spare parts are included with the lot, including a spare bolt and barrel, springs, cocking mechanisms and others.

Very fine, with 98% of the arsenal refurbished parkerized finish, showing some light scratches and handling marks overall, a few areas of brown patina, and a bright arc worn on the side of the receiver by the cocking lever. Mechanically excellent. NOTE: This item is restricted as 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.