How a SMG PP-2000 works

The PP-2000 (Russian: ПП-2000) is a submachine gun/machine pistol made by the KBP Instrument Design Bureau. It was first publicly displayed at the Interpolytech-2004 exhibition in Moscow even though its patent was filed in 2001 and issued in 2003.

It is chambered in 9×19mm Parabellum, and specifically designed to utilize the new Russian 9×19mm 7N21 and 7N31 (Cyrillic: 7Н21 and 7Н31) +P+ armor-piercing versions of the cartridge. This is intended to give the PP-2000 armor-piercing capability comparable to the FN P90 and Heckler & Koch MP7 personal defense weapons while also being able to use common 9mm Parabellum rounds.

One unusual feature is the ability to store a spare 44-round magazine at the rear of the gun, where it also functions as a stock. A wire folding stock is also available. Another unusual feature is that this firearm's charging handle is located directly behind the front sight and folds out of the way when not in use. A similar folding charging handle can be seen on the Heckler & Koch G36.