The PP-19 Vityaz (also known as the PP-19-01 "Vityaz-SN") is a 9×19mm Parabellum submachine gun developed in 2004 by Russian small arms manufacturer Izhmash.

The PP-19 Vityaz is a selective fire submachine gun that uses a simple closed bolt, straight blowback method of operation.

It is chambered for the 9×19mm Parabellum pistol cartridge and will also fire the new high-pressure armour-piercing 7N31 round that can penetrate soft body armour.

The handguard has attachment points for laser target designator, tactical flashlight and fore grip.

[5] The Saiga-9 is a semi-automatic pistol-caliber carbine version of the PP-19 Vityaz with 345 mm barrel sold on the Russian civilian market by Kalashnikov.