$12,500
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 stopped production of both the 760 and MK Arms in general, resulting in a very limited window of transferable production.