PM 9 mm

 is a weapon in Project Argo.

Summary
The PM is an Ukrainian semi-automatic pistol. It is based on a Soviet Union's standard military and police side arm designed by Nikolay Fyodorovich Makarov. It has been produced since 1970s and has been used ever since in Ukraine, Yugoslavia, and places where black market reached from those countries. It uses 9x21 mm caliber instead of the original 9x19 mm. The actual bullet is 9.22 mm in diameter, since caliber in Russia is measured between the grooves and not the lands of the rifling. Being shorter and wider, the 9mm cartridge is incompatible with pistols chambered for 9x21 mm cartridges and vice-versa.