closed bolt of a telescoped design, which wraps around the barrel. The weapon feeds ammunition from a 50-round helical magazine located at the top of the polymer receiver. It is fitted with a collapsible stock and the barrel is threaded to accept a suppressor. Other accessories may include laser pointer, tactical flashlight, and daylight optics. The latest model of the CS/LS06 features modified polymer furniture, a front pistol grip with a different grip angle, a modified trigger guard, a different stock design, and pictographic selector markings. Although it is externally similar to Calico M950, the feed system features a entirely new design due to CS/LS06's rear-feed design lineage. The cylinder magazine contains a helical glide grooves at its inner walls. When the glide rotate by the central axis, the cartridges follows the helical track inside the cylinder. This design allows the gun to store 50 rounds of ammunition in relatively compact package. Variants Changfeng submachine gun Early prototype chambered in 5.8×21mm ammo. QC-9 Early 9×19mm Parabellum prototypes. CF-05 Finalized 9×19mm Parabellum prototype. CS/LS06 Export designation by Norinco. Users : People's Police of the People's Republic of China, People's Armed Police : 100,000 unit. : Uganda National Police : Venezuelan Army In service with the 509 Special Forces Battalion of the Army, Presidential Honor Guard, and the Special Unit for Security and Protection of State Personalities (UESPPE). See also CS/LS5 CS/LS7 References Weapons of the People's Republic of China 9mm Parabellum submachine guns