9×21mm Gyurza

9×21mm

Type

Pistol

Place of origin

Russia

Service history

Used by

FSB
Russian Army

Production history

Designer

TsNIITochMash

Produced

1990s to the present

Variants

SP-10 (7N29), SP-11 (7N28), SP-12, SP-13 (7BTZ)

Specifications

Case type

Straight walled, rimless

Bullet diameter

9.05 mm (0.356 in)

Shoulder diameter

9.6 mm (0.38 in)

Base diameter

9.9 mm (0.39 in)

Rim diameter

9.9 mm (0.39 in)

Rim thickness

1.2 mm (0.047 in)

Case length

20.9 mm (0.82 in)

Overall length

32.7 mm (1.29 in)

Ballistic performance

Bullet weight/type	Velocity	Energy
6.7 g (103 gr) 7N29	410 m/s (1,300 ft/s)	563 J (415 ft·lbf)
7.9 g (122 gr) 7N28	390 m/s (1,300 ft/s)	601 J (443 ft·lbf)
7.2 g (111 gr) 7BTZ	395 m/s (1,300 ft/s)	562 J (415 ft·lbf)

Source(s): Modern Firearms

The 9×21mm Gyurza (Гюрза, Russian for "blunt-nosed viper") round is a Russian handgun round designed to defeat body armor that was developed by TsNIITochMash for its SR-1 Vektor semi-automatic pistol and SR-2 Veresk submachine gun.

Variants

SP-10 (7N29) - armor-piercing bullet with hardened steel core^[1]

SP-11 (7N28) - standard FMJ bullet with lead core

SP-12 - low ricocheting, expanding bullet^[2]

SP-13 (7BT3) - tracer AP bullet based on 7N29

Designations

9×21mm Gyurza
9mm Gyurza

Performance

The method of construction of the rounds allows them to be effective against both unarmored and armored targets. The bullet has a hard sub-caliber core contained within an outer sleeve and separated from it by a polyethylene layer. If the bullet strikes an unarmored target, it holds together to produce a wide wound channel. If the bullet strikes an armored target, the sleeve is stripped away and the core penetrates alone. The 7N29 AP loading fires a 6.7 g (103 gr) bullet at 410 m/s (1,300 ft/s) with 560 J (410 ft·lb) of force, and will reportedly penetrate two 1.2 mm titanium plates, plus 30 layers of Kevlar, at 50 m (160 ft). The disadvantage of the rounds is that high impact velocities are needed for them to work effectively, so the bullets are relatively light to maximize their muzzle velocity. This means they will lose velocity relatively quickly, limiting their effective range.^[3]

Notes

External links

Modern personal defense weapons (PDWs) and cartridges

Personal defense weapons	AO-46 AAC Honey Badger PDW ČZW-438 Floro PDW FN P90 GA Personal Defense Weapon Heckler & Koch MP7 Interdynamics MKR Knight's Armament Company PDW Magpul PDR MARS Interdynamics MKS Modern Sub Machine Carbine PP-2000 QCW-05 Saab Bofors Dynamics CBJ-MS SR-2 Veresk ST Kinetics CPW VBR-Belgium PDW

PDW-caliber pistols	FN Five-seven Glock-VBR 7.92 pistol SR-1 Vector Heckler & Koch UCP Pindad PS-01 QSW-06 QSZ-92 VBR-Belgium CQBW GSh-18

PDW cartridges	.224 Boz 4.38×30mm Libra 4.5×26mm MKR HK 4.6×30mm 5.56×21mm PINDAD 5.56×30mm MARS 5.56×30mm MINSAS FN 5.7×28mm 5.8×21mm DAP92 6×35mm KAC 6.5×25 CBJ-MS 7.92×24mm 9×19 mm 7N31 9×21mm Gyurza 9×39mm

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