9×21mm Gyurza

9x21mm
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 mass/type Velocity Energy 6.7 g (103 gr) 7N28 410 m/s (1,300 ft/s) 563 J (415 ft⋅lbf) 7.9 g (122 gr) 7N29 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 9x21mm 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 Vector semi-automatic pistol and SR-2 Veresk submachine gun.

Variants

SP-10 (7N29) - armor piercing bullet with hardened steel core

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

SP-12 - low ricocheting, expanding bullet

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

Designations

• 9x21mm Gyurza
• 9mm Gyurza

External links

• 9x21mm Ammunition (Russian)
• SR-1 Vector - Modern Firearms
• SP Ammunition - Modern Firearms