View source for CS/LS6

{{Infobox weapon
|name=CS/LS06 (CF-05)<br>Changfeng submachine gun
|image=
|caption=
|origin=China
|type=[[Submachine gun]]
<!-- Type selection -->
|is_ranged=yes
|is_UK=
<!-- Service history -->
|service= 2005–present
|used_by= See [[CF-05#Users|Users]]
|wars=
<!-- Production history -->
|designer=Qing Shangsheng
|design_date= 1993–1994 (5.8mm prototype)<br>2001–2005 (9mm)
|manufacturer=Chongqing Changfeng
|production_date= 2005–present
|number=
|variants= See [[CF-05#Variants|Variants]]
<!-- General specifications -->
|weight=2.1&nbsp;kg (w/empty magazine)
|length=405&nbsp;mm (Stock retracted)<br>588&nbsp;mm (stock extended)
|part_length=232&nbsp;mm
|width=64&nbsp;mm
|height=195&nbsp;mm
|crew=
<!-- Ranged weapon specifications -->
|cartridge=[[9×19mm Parabellum]]
|caliber=
|action=Blowback
|rate=800 Rounds/minute
|velocity=400&nbsp;m/s
|range=150&nbsp;m
|max_range=
|feed=50-round [[helical magazine]]
|sights= Open sights
}}

The '''CS/LS6''', formerly '''CS/LS06'''<ref>{{cite web|url=https://armamentresearch.com/chinese-csls06-chang-feng-sub-machine-gun/ |title=Chinese CS/LS06 'Chang Feng' sub-machine gun |publisher=[[armamentresearch.com|ARES]] |date=28 August 2019 |author=N. R. Jenzen-Jones }}</ref> or '''CF-05''', also known as the '''Changfeng submachine gun''' ({{zh|c=长风冲锋枪/長風衝鋒槍|p=Cháng Fēng chōng fēng qiāng}}), is a submachine gun developed by Chongqing ChangFeng Co. Ltd in the early 1990s in response to China's demand for a new submachine gun design.<ref name="SD">{{cite web|url=http://www.sinodefence.com/army/small_arms/cf05.asp|archiveurl=https://web.archive.org/web/20070817234639/http://www.sinodefence.com/army/small_arms/cf05.asp|title=CF05 9mm Submachine Gun |archivedate=17 August 2007|publisher=SinoDefence.com}}</ref> 

It was developed by the same team who designed the [[QSZ-92]] pistol, which is now the primary pistol used by PLA and PAP.<ref name="SD"/> Originally designed for [[5.8×21mm]] cartridge, after being rejected by the PLA it was offered for export chambered in [[9×19mm Parabellum]].

==Development==
The CF-05 was designed by Qing Shangsheng, a senior designer of Chongqing ChangFeng Corporation, who also designed the [[QSZ-92]] pistol.<ref name="gw">{{cite web|url=http://pewpewpew.work/china/smg/cf05/lwsmg.htm |title=CS/LS06冲锋枪 |website=Guns' World|language=Chinese|trans-title=CS/LS06 Submachine Gun|archiveurl=https://web.archive.org/web/20230218224523/http://pewpewpew.work/china/smg/cf05/lwsmg.htm|archive-date=February 18, 2023}}</ref> According to the designer, the CF-05 was his private project initiated between 1993 and 1994, and was not brought to the attention of his factory manager until 1996.<ref name="ares">{{Cite web|url=https://armamentresearch.com/chinese-csls06-chang-feng-sub-machine-gun/|title=Chinese CS/LS06 'Chang Feng' sub-machine gun|last=Jenzen-Jones|first=N.R.|date=28 August 2019|website=Armament Research Services|language=en-GB|url-status=live|archive-url=https://web.archive.org/web/20190829102404/http://armamentresearch.com/chinese-csls06-chang-feng-sub-machine-gun/ |archive-date=29 August 2019 |access-date=2019-09-18}}</ref> Early prototypes were built to compete in [[People's Liberation Army]]'s 5.8mm suppressed submachine gun project. The first prototypes had a secondary feed option, with a pistol magazine inserted into the pistol grip in addition to the distinctive [[Magazine (firearms)#Helical|helical magazine]] inserted at the feed-port located at the rear of the weapon, which makes the magazine works like a dual-purpose gunstock. Once the primary magazine had been exhausted, the shooter could switch to the secondary magazine to sustain firing. The rear-feed design was changed during the testing due to the inconvenience in ergonomics, also the firearms expert felt the feed-hole at the gun rear aesthetically unpleasing. Eventually, Changfeng's bid lost to Jianshe corporation's [[QCW-05]] proposal in 2001.<ref name="gw" />

After losing to QCW-05, Changfeng decided export sales were to be a priority, and they needed to make a 9mm version, later named QC-9.<ref name="gw" /> Development team made several other improvement to improve the design’s ergonomics and reliability. The second prototype moved the helical cylinder to the top, and it features a new telescoping stock. The third prototype made improvement to the stock. Upon testing, the secondary feed option was abandoned due to the possibility of introducing malfunctions caused by human error during field operations. In March 2004, the final prototype, which dropped the secondary feed function, went through a review before the design was finalized in May 2005.<ref name="HK">{{Cite web|url=http://hk.huaxia.com/thjq/bqdg/ljbq/cfq/2007/03/32975.html|title=中國Cf05式螺旋彈筒衝鋒槍|archive-url=https://web.archive.org/web/20131022171643/http://hk.huaxia.com/thjq/bqdg/ljbq/cfq/2007/03/32975.html|archive-date=22 October 2013|access-date=28 April 2013|url-status=dead|trans-title= China's Type CF05 Spiral Round Submachine Gun}}</ref> The finalized prototype received internal designation CF-05. Export effort was made in 2006, which gives the production designation CS/LS06, the current name marketed by [[Norinco]].<ref name="ares" /><ref>{{cite web|url=https://www.sohu.com/picture/319423499 |title=军事丨长风弹筒冲锋枪一眼看过去，让人感到头重脚轻的感觉 |website=Sohu News |date=9 June 2019 |language=Chinese|archiveurl=https://web.archive.org/web/20210624204335/https://www.sohu.com/picture/319423499|archive-date=June 24, 2021|trans-title= Military Matters: A Quick Passing Glance at the ChangFeng Submachine Gun's Cartridge, lets people perceive the top-heavy sensation.}}</ref>

== Design ==
The CF05 submachine gun is a [[Blowback (firearms)|blowback]]-operated weapon chambered for the [[9×19mm Parabellum|9 × 19 mm]] cartridge. It fires from a [[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.<ref name="mt">{{cite web|url=http://www.military-today.com/firearms/cf_05.htm |title=CF-05 |website=Military Today|archiveurl=https://web.archive.org/web/20221127104844/http://www.military-today.com/firearms/cf_05.htm|archive-date= November 27, 2022}}</ref>

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.<ref name="ares" /><ref name="mt" />

==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==
<!--READ FIRST: This section is for cited entries only. Please do not add entries into this list without a citation from a reliable source. All entries without a citation will be removed. Thank you.-->

* {{flag|People's Republic of China}}: [[People's Police of the People's Republic of China]], [[People's Armed Police]]<ref>{{cite web|url=http://world.guns.ru/smg/smg74-e.htm|title=Modern Firearms|work=guns.ru|access-date=28 October 2008|archive-url=https://web.archive.org/web/20081028204356/http://world.guns.ru/smg/smg74-e.htm|archive-date=28 October 2008|url-status=dead}}</ref>
* {{flag|Myanmar}}: 100,000 unit.<ref name="mt" />
* {{flag|Uganda}}: [[Uganda National Police]]<ref>{{cite web|url=http://www.thefirearmblog.com/blog/2011/12/13/new-variant-of-chang-feng-submachine-gun-spotted-in-uganda/|title=New Variant of Chang Feng Submachine Gun Spotted in Uganda - The Firearm Blog|work=The Firearm Blog|archiveurl=https://web.archive.org/web/20221127104953/https://www.thefirearmblog.com/blog/2011/12/13/new-variant-of-chang-feng-submachine-gun-spotted-in-uganda/|archive-date= November 27, 2022}}</ref>
* {{flag|Venezuela}}: [[Venezuelan Army]]<ref>{{Cite web|last=Infodefensa.com|first=Revista Defensa|date=2018-06-14|title=Las Fuerzas Especiales de Venezuela incorporan la Chang Feng CF05 - Noticias Infodefensa América|url=https://www.infodefensa.com/latam/2018/06/14/noticia-fuerzas-especiales-venezuela-incorporan-chang.html|access-date=2021-09-04|website=Infodefensa.com|language=es|archiveurl=https://web.archive.org/web/20190420194346/https://www.infodefensa.com/latam/2018/06/14/noticia-fuerzas-especiales-venezuela-incorporan-chang.html|archive-date= April 20, 2019|trans-title= Venezuelan Special Forces Incorporate the Chang Feng CF05}}</ref><ref name=":1">{{Cite web|url=http://armamentresearch.com/chinese-chang-feng-sub-machine-gun-in-venezuela/|title=Chinese 'Chang Feng' sub-machine gun in Venezuela|last=Pérez|first=Pedro|date=19 August 2019|website=Armament Research Services|language=en-GB|url-status=live|archive-url=https://web.archive.org/web/20190820015731/http://armamentresearch.com/chinese-chang-feng-sub-machine-gun-in-venezuela/ |archive-date=20 August 2019 |access-date=2019-09-18}}</ref> In service with the 509 Special Forces Battalion of the Army, [[Presidential Honor Guard (Venezuela)|Presidential Honor Guard]], and the Special Unit for Security and Protection of State Personalities (UESPPE).<ref name=":1" />

==See also==
* [[CS/LS5]]
* [[CS/LS7]]

==References==
{{reflist}}
{{Use dmy dates|date=June 2017}}

[[Category:Submachine guns of the People's Republic of China]]
[[Category:9mm Parabellum submachine guns]]