Originally manufactured in Germany in 1985 as a HK94 semi-automatic rifle, this firearm was upgraded by Fleming Firearms of Collinsville, OK (so marked on the right side of the receiver, hidden by the trigger group) into a MP5 sub-machine gun, with a remarked receiver, proper length barrel, welded sear trip on the bolt and a "0/1/A" (safe/semi/full-auto) marked trigger group with a pack modified to be compatible with a commercial "shelf" style receiver. Patterned after the SD ("Schalldaemfer") variant, this example is fitted with a conventional, unported barrel, and currently lacks a silencer. With the closure of civilian machine gun registration in 1986, this H&K got in right under the wire, and would be among the last H&K guns to be fully transferrable. Fitted with a post front sight and a 4-peep rotating drum rear sight, Flemming added "MP5SD" marking and "IF" date code on top of the receiver and the Heckler & Koch Chantilly, Virginia address on the right side of the magazine well. The grip is right handed with the aforementioned markings on the trigger group, with a round, ribbed forearm and a fixed buttstock. With twelve extra magazines.

Very fine as upgraded by Fleming with 95% matte black finish, scattered surface scratches and nicks, and some small scuffs on the buttstock and grip. Mechanically excellent. Extra magazines are good with visible red oxidation on all. 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.