Built up from a limited quantity of receivers made by Pearl Manufacturing prior to the closure of machine gun registration in 1986, the UC is an open bolt SMG configured to accept Uzi mags and fire in full automatic only. The major twist is that the weapon is designed to fold in half for transport, storage, and concealment; when closed, the UC looks like a fairly mundane metal box 10 5/8" long, 4 1/2" wide and 1 3/8" thick, but can be unfolded into a fully functional automatic weapon in seconds. Somewhere around 100 receivers were made before the closure of registration. Some of these receivers were built into the "DEB M21" in a collaboration between the inventor, Utah Connor and David E. Boatman; one of them appears prominently in the film Robocop 2, dressed up with a handle and a cosmetic antenna to hide in plain sight as a child's radio before spitting hot lead. About 70 others were acquired following the inventor's death by the M6 Management Corporation, who proceeded to build them out in the configuration seen here. Doing away with the carry handle from the M21, the UC design integrates a short mounting rail into the concealed charging handle, suitable for mounting a modern pistol-sized laser; a Laserlyte-brand laser is installed, with the beam projecting through a slot in the charging handle. The maker's marks are marked twice on the receiver, engraved on top (prominent to count as visibly marked for legal purposes, but subtle enough to not invite unwanted attention) and more prominently stamped on the underside. An ambidextrous safety switch is installed ahead of the trigger, with the trigger, guard and pistol grip all hinged to fold forward when closed. When closed, a separate dust cover is used to close off the open end of the stock and the rear of the receiver; this dust cover was conceived as an expendable component, to be discarded in the heat of the moment and hopefully provide a brief distraction while the UC is brought into play. Included with the item is a padded transport case, a Lula brand loader, a set of replacement springs from M6, instructions, and a set of spare dust covers.

Excellent, with 95% plus black gloss finish, showing some handling wear and contact marks from folding, particularly on the right side. Mechanically excellent. All but guaranteed to turn heads at the range, delight your friends, and leave the opposition extremely (but very briefly) confused. 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) under the provisions of 18 U.S.C. Chapter 44 and 27 CFR part 478.