The final wartime revision of the Thompson Submachine Gun, the M1A1 replaced the articulated firing pin in the bolt with a fixed pin on the bolt face, which by that point had become the de-facto standard for SMG bolt design. Fixed blade front and peep rear sights, with "U.S./PROPERTY" on top of the receiver and a set of "GEG" and "FJA" inspector marks on the left. Properly for the model, there is no provision to accept drum magazines, and the bolt is the proper heavyweight M1A1 fixed pin configuration. The trigger housing is numbered to match on the guard, with a checkered magazine catch, smooth "drum" style selector and safety switches, and a screw-attached buttstock. A hardwood case is included, along with two boxes of ammo, oilers, cleaning rods, sling, and four extra magazines in a 5-cell canvas magazine pouch.