SP-4
| SP-4 | |
|---|---|
|
|
| general information | |
| caliber | 7.62 × 42 mm |
| Dimensions | |
| Floor ⌀ | 7.76-7.91 mm |
| Cartridge bottom ⌀ | 7.62 mm |
| Cartridge length | 42 mm |
| Weights | |
| Bullet weight | 9.3 g |
| total weight | 24 g |
| Technical specifications | |
| Speed v 0 | 195-205 m / s |
| Bullet energy E 0 | 200 y |
| Lists on the subject | |
The SP-4 (decimal caliber 7.62 × 42 mm ) is a cartridge for quiet handguns specially developed for a quiet shot , which was developed in the Soviet Union and is the successor to the SP-3 and PZAM ammunition. The 9.3 g projectile is accelerated inside the case in a cylinder. When it leaves the cylinder, the sleeve is closed and no further gases can escape; this prevents a bang from expanding gases and it is no longer necessary to use a silencer .
The ammunition was intended for the PSS pistol ( Pistolet Spezialnyj Samosarjadnyj , German: Spezial-Selbstladepistole ), which was introduced in 1983 by the Soviet secret service KGB and the special unit Speznas . It is still in use at the FSB . Except in the PSS, the SP-4 is used in the shooting combat knife NRS-2.
Of particular interest is the fact that with this ammunition it became possible to construct silenced revolvers as well. Even if you were to mount a silencer, the drum gap prevents a revolver from firing silently. But since no powder gases can escape, this is irrelevant here. One example of this is the OZ-38 developed by Igor Jakowlewitsch Stetschkin .
See also
literature
- Ilya Shaydurov: Russian firearms - types, technology, data . Motorbuch Verlag, Stuttgart 2010, ISBN 978-3-613-03187-6 .
- SP-4 at waffeninfo.net
- world.guns.ru: SP-4 silenced ammunition (English)
Individual evidence
- ↑ Бесшумный револьвер ОЦ-38. Retrieved September 20, 2015 (Russian).