Manufactured in 1981 as a semi-automatic rifle and imported by HK Inc., this item has been upgraded to a selective fire automatic weapon by Billistics Inc., of Wallingford, Connecticut. Notably, this example is built around a "pin" pattern lower receiver; the lion's share of transferable converted HK machine guns in the USA are built on "shelf" pattern receivers. Hooded post front and four-position drum rear sight, with a birdcage flash hider on the short "IC V" marked barrel, model and importer markings on the magazine well, and the Billistics address on the left rear of the receiver. The trigger housing is plastic construction, with four position pictographic selector markings, an ambidextrous selector switch, and a "pin" pattern trigger pack configured for safe, semi-automatic, three-round burst, and full automatic. The "n" marked bolt carrier is in original full auto configuration, with a 1982 (IC) dated bolt head. With a textured triangular forearm and a two-position telescoping buttstock.

Very fine as upgraded to full auto, with 95% plus factory quality matte black finish, showing some light wear and handling marks on both the metal and plastic. Mechanically excellent. 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.