10.2x22mm

The 10.2x22mm (also known as .40 Parabellum) is a rimless, polymer cased pistol cartridge used as standard ammunition by the UNSCDF.
== Cartridge variants ==
M135: semi armor-piercing high-explosive.
M138: hollow point.
M337: tactical training round.
M423: high-explosive squash head.
M454: subsonic armor-piercing.