Originally manufactured in West Germany in 1981, this rifle was subsequently converted to a fully automatic machine gun in HK53 configuration by Fleming Firearms, which included permanently modifying the receiver from the semi-auto only "shelf" configuration to the full auto "pin" configuration. Post front and four-position drum rear sight, with a long four-pronged flash hider on the "ICU" marked barrel", Fleming markings added to the left side near the claw mounts, "HK53" and the "IB" date code on the left side of the magazine well and HK Inc. address on the right side. As noted, the "shelf" has been trimmed down, and a functional paddle release for the magazine installed, with a triangular forearm, textured pistol grip with ambidextrous "full/3-round/semi/safe" pictographic markings, and a two position telescoping buttstock. The trigger pack is fitted with an ambidextrous selector, and configured to match the external markings. The bolt and bolt carrier are both dated "IB", with the latter altered to trip the auto sear.

Very fine as upgraded to full automatic, with 97% plus factory quality matte black finish, showing light wear and handling marks. The furniture is also excellent. Some rust is visible on the seams of the magazine body. Mechanically very good. 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 479.