QCW-05

In October 2001, Jianshe Industries (Group) Corporation, a subsidiary of China South Industries Group, won the bid to develop a next-generation submachine gun for the People's Liberation Army to replace the Type 79 and Type 85 silenced submachine guns. Developed in collaboration with the China South Industries Group 208 Research Institute, the design was selected over competitors, including the Changfeng CF-05, due to its ease of construction and operation. The weapon was officially introduced at the 2005 International Police Equipment Expo in Beijing under the designation QCW-05.

The weapon is an open-bolt, blowback-operated bullpup submachine gun. Its construction incorporates a compact aluminum receiver and polymer housing. It features a thumb-operated fire selector located on the left side above the pistol grip, offering safe, semi-automatic, and fully automatic firing modes. The charging handle is housed within the carrying handle, and spent casings eject from a port on the right side. Primary sighting options include a flip-up rear sight and a combined optical sight consisting of a zoom lens and a visible laser module. Ammunition feeds from a straight-insert, quad-stacked, double-feed box magazine. The weapon utilizes a removable, screw-on cylindrical suppressor designed for subsonic ammunition, though regular supersonic ammunition can be fired in emergencies.

The weapon is in service with the People's Liberation Army, the People's Armed Police, the Chinese People's Police, and the Chinese Militia. When configured without the suppressor, the weapon is designated as the QCQ-05 and is optimized to fire standard pistol ammunition. A variant developed in 2004 for police forces and export markets is the JS 9mm. This variant is chambered for standard Parabellum ammunition and replaces the carrying handle with a top-mounted Picatinny rail on its second prototype.