9x39

Overview

The 9×39mm is a Soviet rifle cartridge, It is based on the Soviet 7.62×39 mm round, but with the neck expanded to fit a 9.3mm bullet. It was developed in the 1980s. The intent was to create a subsonic cartridge for suppressed firearms for special forces units that had more power, range, and penetration than pistol cartridges usually used in such weapons. 

Stats

Note: Barrier penetration represents the rounds ability to go through walls and barriers. Armor piercing represents the rounds ability to penetrate body armor plates.