Originally manufactured by Heckler & Koch in 1985 as a HK94 semi-automatic rifle and imported by HK Inc, this rifle was converted to a "MP5SD" style submachine gun by Hard Times Armory of Smyrna, Georgia. In addition to the installation of a "shelf" pattern trigger pack and a welding up of the bolt carrier to engage the auto-sear, Hard Times added a foot long extension to the receiver which houses the barrel and a baffle stack, with the endcap housing a double wipe assembly. In emulation of the original SD model, ports have been drilled into the barrel to vent gas into the silencer before the bullet clears the muzzle; in the SD, this was intended to drop the effective muzzle velocity of standard NATO 9mm Parabellum ball ammunition below the supersonic threshold, reducing the overall signature of the weapon without requiring specialized "cold loaded" subsonic ammunition. Hooded post front and 4-position drum rear sights, with the Hard Times markings on the underside of the receiver, model and date markings on top, a "0/1/A" marked trigger housing, textured pistol grip and two-position telescoping buttstock. The bolt carrier and trigger pack are not visibly marked, and the bolt head is dated "IF" (1985). Included with the lot is a rubber heat shield for the silencer assembly and an extra magazine. This 94S is consecutively serial numbered to the previous lot, another 1985 production H&K converted to a SD-pattern integrally silenced submachine gun.