The XXX was produced by whom?
PP-90
The PP-90 (short for Pistolet-Pulemet obrazets 1990, Russian: ПП-90 -- Пистолет-пулемет, ``Machine Pistol model of 1990'') is an automatic-only weapon that uses the straight blowback method of operation, chambered for the 9×18mm Makarov cartridge.