Originally manufactured by Smith & Wesson as the Model 76, which in turn was designed to fill the same niche as the Gustaf M/45 "Swedish K" SMG, the MK Arms MK760 is a lightweight and agile weapon for close quarters fighting and, in the initial S&W incarnation, was a go-to weapon for the American special warfare community in Vietnam. Brought to market in 1983, the passage of the 1986 Firearm Owners Protection Act killed both the 760 and MK Arms in general, resulting in a very limited window of transferable production. Protected post front and notch rear sights, with the MK Arms markings on the magazine well, a combination barrel nut and ventilated heat shield, ambidextrous "SAFE"/"SEMI"/"FULL" selector, and a checkered pistol grip. A left-folding buttstock with rubberized covering is installed, and a 5 3/4 inch section of scope rail has been added to the receiver tube. Included with the lot is a matching numbered MK Arms box, two extra magazines, assorted papers, spare grip, other small extra parts, and a Harris-style bipod.

Very fine, with 75% of the original matte gray phosphate finish, showing areas of rubbing, light scratches and mild handling marks. The stock rubber shows some minor scuffs. The magazine catch needs adjustment, otherwise mechanically fine. 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.