Manufactured in 1983 and converted to the current configuration by Quality Mfg. and Fleming Firearms of Oklahoma, these submachine guns have become one of the most favored weapons of the police and military around the world for all manner of close quarters applications. This variant of the MP5, the MP5SD6 was developed with the integral but detachable silencer in mind, as well as being fitted with a lightweight bolt, and the "navy" four-position ambidextrous selector switch allowing for fully automatic, three-round burst, semi-automatic, and safe modes. It is fitted with hooded post front and elevation adjustable drum rear sights, checkered charging handle, finned rubber foregrip, and collapsible metal buttstock with checkered polymer buttplate. The Fleming and Qualified markings are on the sides of the receiver, concealed by the hinge pin trigger housing. The trigger pack is also hinge pattern, with an ambidextrous safety. It is also fitted with the S&H Arms silencer ("B").

Marked with S&H Berryville address and serial number, with checkered grip area.