JS 9 mm vs SAR 21: Specs Compared

FORCETALLY

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ASmall arms

JS 9 mm

Bullpup submachine gun Personal defense weapon

BSmall arms

SAR 21

Bullpup assault rifle

Credit

Mztourist · CC BY-SA 4.0 · Resized · CC BY-SA 4.0 · Source ↗ · Modified

First system

Second system

At a glance

Side by side

Length comparisonOne shared metre scale

JS 9 mmLength

0.45 m

Length source ↗

SAR 21SAR 21, SAR 21 40 GL/M203, SAR 21 P-Rail

0.805 m

Length source ↗

Lengths retain their source configuration and measurement scope.

JS 9 mmlarger figure on 1 of 2

Rate of fire+64%

SAR 21larger figure on 1 of 2

Barrel length

Measured figures

Head to head

15 of 34 rows sourced on both sides

450mm

805mmSAR 21, SAR 21 40 GL/M203, SAR 21 P-Rail

Length

All recorded figures & sources

0.45 m

Length

Single source

450 mm (17.7 in)^[source]

0.64 m

SAR 21 Light Weight Carbine

Single source

Configuration

Details

JS 9 mm and SAR 21 configuration
Specification	JS 9 mm	SAR 21
Type	Bullpup submachine gun Personal defense weapon^[source]	Bullpup assault rifle^[source]
Place of origin	China^[source]	Singapore^[source]
Designer	Jianshe Industry (Group) Corporation^[source]	Tuck Wah Chee and Felix Tsai of Chartered Industries of Singapore / ST Kinetics^[source]
Manufacturer	China South Industries Group^[source]	• CIS: 1999–2000 • ST Kinetics : 2000–present

Produced	2006–present^[source]	1999–present^[source]

Cartridge	5.8×21mm DAP92 9×19mm Parabellum^[source]	5.56×45mm NATO^[source]

Action	Blowback , open bolt^[source]	Gas-operated , rotating bolt^[source]

Feed system	30-round detachable box magazine^[source]	30-round detachable plastic box magazine Export models: STANAG magazines^[source]

Sights	Open sight block, fixed front peep sight, flip up back sights^[source]	1.5x or 3x optical sight; back-up iron sights^[source]

Source measurement	The CS/LS2 , formerly known as the JS 9 mm ( Chinese : JS 9 mm冲锋枪 ; pinyin : JS 9 mm Chōngfēng Qiāng ; lit. 'JS 9 mm Submachine Gun') is a commercial export version of the QCW-05 submachine gun used by the People's Liberation Army . The weapon is designed specifically for police and law enforcement.^[source]JS 9 mm · Lead; only the objects and conditions stated in this passage Following the development of the QCW-05 submachine gun, Jianshe Industries (Group) Corporation, a company under the China South Industries Group Corporation developed a police- and export-oriented version of the QCW-05, called JS 9. The first prototype of the JS 9mm is essentially a shortened QCW-05, with the same carry handle and iron sights, but with a modified caliber for the popular 9×19mm Parabellum . The second prototype removed the carry handle and opted for a Picatinny rail. The JS 9 mm was first showcased in 2005 at the China Police Equipment Exhibition.^[source]JS 9 mm · Development; only the objects and conditions stated in this passage The JS submachine gun is a bullpup weapon similar to the QCW-05 . It is slightly shorter than the QCW05 and does not feature the carry handle. Instead, a Picatinny rail is located on top of the upper receiver, which allows customization of optics. The JS 9 mm features both automatic and semi-automatic firing mode.^[source]JS 9 mm · Design; only the objects and conditions stated in this passage The JS 9 mm is designed to take commercially available 9×19mm Parabellum or the indigenous 9×19mm DAP92-9 round. It is also capable of accepting widely used MP5 magazines along with its own double-column, 30-round, box magazine. A 50-round quad stack magazine for the 9×19mm was also developed, but did not enter production.^[source]JS 9 mm · Design; only the objects and conditions stated in this passage The JS 9 mm features several accessories, including daylight sights, night vision sights, infrared sights, and screw-on suppressors.^[source]JS 9 mm · Design; only the objects and conditions stated in this passage	—

Source measurement

The CS/LS2 , formerly known as the JS 9 mm ( Chinese : JS 9 mm冲锋枪 ; pinyin : JS 9 mm Chōngfēng Qiāng ; lit. 'JS 9 mm Submachine Gun') is a commercial export version of the QCW-05 submachine gun used by the People's Liberation Army . The weapon is designed specifically for police and law enforcement.^[source]JS 9 mm · Lead; only the objects and conditions stated in this passage

Following the development of the QCW-05 submachine gun, Jianshe Industries (Group) Corporation, a company under the China South Industries Group Corporation developed a police- and export-oriented version of the QCW-05, called JS 9. The first prototype of the JS 9mm is essentially a shortened QCW-05, with the same carry handle and iron sights, but with a modified caliber for the popular 9×19mm Parabellum . The second prototype removed the carry handle and opted for a Picatinny rail. The JS 9 mm was first showcased in 2005 at the China Police Equipment Exhibition.^[source]JS 9 mm · Development; only the objects and conditions stated in this passage

The JS submachine gun is a bullpup weapon similar to the QCW-05 . It is slightly shorter than the QCW05 and does not feature the carry handle. Instead, a Picatinny rail is located on top of the upper receiver, which allows customization of optics. The JS 9 mm features both automatic and semi-automatic firing mode.^[source]JS 9 mm · Design; only the objects and conditions stated in this passage

The JS 9 mm is designed to take commercially available 9×19mm Parabellum or the indigenous 9×19mm DAP92-9 round. It is also capable of accepting widely used MP5 magazines along with its own double-column, 30-round, box magazine. A 50-round quad stack magazine for the 9×19mm was also developed, but did not enter production.^[source]JS 9 mm · Design; only the objects and conditions stated in this passage

The JS 9 mm features several accessories, including daylight sights, night vision sights, infrared sights, and screw-on suppressors.^[source]JS 9 mm · Design; only the objects and conditions stated in this passage

—

Country of origin	China^[source]Inventory Origin column; table 4, row 5, cell 5; revision 1377673382; retrieved 2026-10-01	—

In service	—	1999–present^[source]

Used by	—	See Users^[source]

Designed	—	1996^[source]

Variants	—	See variants^[source]

Barrels	—	Single barrel 1:12" and 1:7" twist options^[source]

Reported operators	Reported operator · China Reported operator · Laos Reported operator · Mali	Reported operator · Botswana Reported operator · Brunei Reported operator · Indonesia Reported operator · Morocco Reported operator · Peru Reported operator · Singapore Reported operator · Thailand Reported operator · Sri Lanka