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5.45×18mm MPTs (7N7)
5.45×18mm
Type Pistol cartridge
Place of origin Flag of the Soviet Union.svg Soviet Union
Service history
In service 1973–
Used by Russian military
Russian police
KGB
Production history
Designer A.D. Denisova;
Precision Mechanical Engineering Central Research Institute (TsNIITochmash)
Designed 1970
Manufacturer Tula Arsenal
Produced 1973–
Specifications
Case type Rimless, bottlenecked
Bullet diameter 5.63 mm (0.222 in)
Neck diameter 6.26 mm (0.246 in)
Shoulder diameter 6.26 mm (0.246 in)
Base diameter 7.64 mm (0.301 in)
Rim diameter 7.64 mm (0.301 in)
Rim thickness 1.13 mm (0.044 in)
Case length 18.03 mm (0.710 in)
Overall length 25.00 mm (0.984 in)
Rifling twist 270 mm (1 in 10.63 in)
Primer type Berdan or Boxer small pistol
Maximum pressure 175.00 MPa (25,382 psi)
Ballistic performance
Bullet weight/type Velocity Energy
38.6 gr (3 g) FMJ 320 m/s (1,000 ft/s) 128 J (94 ft·lbf)
Test barrel length: 84
Source(s): C.I.P.

5.45×18mm MPTs (7N7) is a Soviet pistol cartridge.[1] It is chambered in the PSM pistol and OTs-23 Drotik machine pistol.

It was designed in the Soviet Union in the early 1970s by Antonina D. Denisova at the Precision Mechanical Engineering Central Research Institute (TsNIITochmash). The development was done in concert with that of the PSM.

The cartridge is designed to use light spitzer-pointed jacketed high velocity bullet. In terms of power, the bullet energy is stated to be up to 1.5 times that of the .25 ACP in a similar sized cartridge. More importantly, it is stated to be capable of penetrating 30–45 layers of Kevlar soft body armor followed by 10 to 15mm of solid pinewood at "realistic engagement distances".

Though the pistol was originally intended to be a pocket pistol for issue to high-ranking Soviet officers, it has reportedly found popularity amongst police and KGB officers as an easily concealed and suppressed operational pistol.

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