|Type||Personal defense weapon|
|Place of origin||China|
|Manufacturer||Not known outside China|
|Case type||Rimless, Bottleneck|
|Bullet diameter||6.00 mm (0.236 in) |
|Neck diameter||6.57 mm (0.259 in)|
|Shoulder diameter||7.77 mm (0.306 in)|
|Base diameter||7.95 mm (0.313 in)|
|Rim diameter||7.97 mm (0.314 in)|
|Rim thickness||1.13 mm (0.044 in)|
|Case length||21.00 mm (0.827 in)|
|Overall length||32.50 mm (1.280 in)|
The cartridge was designed for replacements of 7.62×25mm Tokarev–chambered small arms for the People's Liberation Army that would offer a wound as large as a standard 9×19mm Parabellum round. This round is offered in both a standard, and subsonic version. Both the QSZ-92 pistol and the QCW-05 Type 05 submachine gun are produced in this caliber as well as 9×19mm Parabellum.
The 5.8×21mm is slightly less powerful than similar Western rounds, like the 5.7×28mm and 4.6×30mm. It has a steel-cored 3 g (46 gr) bullet that has a muzzle velocity of 530 m/s (1,700 ft/s) and muzzle energy of 420 J (310 ft·lb) from a submachine gun barrel. The round can penetrate 1.3 mm (0.051 in) of helmet steel plate, and 50 mm (2.0 in) of pine wood behind it, out to 100 meters.
- "5.8x21 / MUNICION.ORG". http://www.municion.org/5_8/5_8x21.htm. Retrieved March 23, 2012.
- Handgunsmag.com. Retrieved 3 April 2013.
- Fortier, David M. (September 24, 2010). "Military Ammo Today". Guns & Ammo. http://www.handgunsmag.com/2010/09/24/ammunition_hg_militarytoday_200811/. Retrieved September 25, 2012.
- Popenker, Maxim. "Modern Firearms - QSZ-92 pistol". World Guns. http://world.guns.ru/handguns/hg/ch/qsz-92-e.html. Retrieved September 25, 2012.
- Popenker, Maxim. "Modern Firearms - Type 05 submachine gun". World Guns. http://world.guns.ru/smg/ch/type-05-e.html. Retrieved September 25, 2012.
- Where Next For PDWs? by Anthony G Williams
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