PP-2000 is a Russian PDW. Designed for reliability, it has a minimal number of parts - which also helps to keep production cheap.
The PP-2000 is very simply designed. Using the blowback principle, it fires from an open bolt. There is no charging handle - to cycle the weapon, one has to press against the jutting out front part of the bolt over the barrel. The trigger guard is enlarged and shaped to serve as front handle. The PP-2000 uses proprietary box magazines for 20 and 44 rounds. Earlier models had no buttstock per se, but back part of the gun has opening, in which spare magazine could be inserted to form a buttstock. Later models gained wire folding buttstock.
While able to accept standard 9x19mm Parabellum ball ammunition, the PP-2000 is intended to be used with 7N31 armor-piercing ammo. This ammo offers a significant increase in armor-defeating capabilities.
The PP-2000 has not been adapted in mass service anywhere yet, but is offered to eligible buyers among Law Enforcement and Military around the world.