A counterpart to the more common Model 50 Reising, the Model 55 was developed based on USMC feedback on the 50, with an eye for arming their "Paramarine" parachute units with a compact close-quarters battle weapon. Internally the 55 is nearly identical to the 50, with the primary differences being A) the elimination of the muzzle brake to reduce overall barrel length and B) adding a short hardwood stock with side-folding metal buttstock, similar to the M1A1 Paratrooper Carbine. While regarded as a lightweight and accurate weapon, the Reising struggled in combat conditions, being prone to malfunction if not kept scrupulously clean; while it had success as a "home front" post defense, police and security weapon, the Marines parted ways with the Reising as soon as suitable quantities of Thompsons, M3s, and carbines were available. Blade front and elevation adjustable peep rear sights, with "PM" marked at the rear of the fluted barrel, three-line manufacturer markings (with the second "5" in "55" struck through a "0"), and a three position selector switch on the right side. The stock is fitted with sling swivels on the forearm and pistol grip, and the hardware for the folding stock on the left side. Included with the lot is a shipping box, canvas sling, cleaning rod, two manuals, a "U.S.M.C." marked five-cell tan canvas magazine pouch, four extra magazines, and a "USMC frogskin" pattern soft case hand-marked "G.W. CHOAT" on the exterior. Consignor information attributes the weapon (but not the other included items) to the Harrington & Richardson factory museum, where it was reportedly on display until being sold in the early 1980s. Online records list a George William Choate Junior as a Private with Company D, 2nd Battalion, 28th Marine Regiment, Fifth Marine Division of the Fleet Marine Force, reported as KIA on February 19, 1945; this would correspond to the first day of ground action in the Battle of Iwo Jima, where the Fifth Division suffered severe casualties during their efforts to get clear of the beaches near Mount Suribachi to move on to their inland objectives.

Excellent, with 98% of the original parkerized finish, showing some light wear and handling marks. The stock is also excellent, with some minor scratches and dings. Mechanically excellent. Accessories are very fine, with light wear and staining. 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 479.