► comfortable carrying and transportation due to buttstock folding;
► possible use of a detachable silencer;
► joining of two magazines in one block to speed up charging.

The 9mm PP-19-01 submachine gun Vityaz-SN (ver. 20) is designed to engage manpower, including manpower protected with personal armor, and unarmored vehicles (passenger vehicles, trucks, etc). The submachine gun is chambered for various 9x19mm ammunition.

Automatics operates on free bolt recoil principle. Trigger mechanism makes it possible to deliver single-shot and automatic fire. The gun is fed from a sector-type magazine.

Vityaz-SN can be provided with two types of mounting rails for optical or collimator sights: a Pikatinni rail on the receiver top or a dove-tail side rail. On the base of the front iron sight and forearm there are attachment points for laser target designator, optical flash or fore grip.