The Tokarev Sportowy is a Tokarev TT-33 training semi-automatic pistol produced in Poland and used within the former Warsaw Pact countries.
Design While the barrel is sized to receive a .22 caliber projectile, the chamber and magazine are sized to receive 7.62×25mm Tokarev cartridges. Typically, .22 LR cartridges are inserted into a hollow 7.62×25mm Tokarev shaped cartridge, which is then loaded into the firearm.https://gatdaily.com/articles/weird-tokarevs-the-tt-33-evolved/
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Sources журнал «Оружие», No. 7, 2003 (спецвыпуск журнала, полностью посвящён описанию пистолетов ТТ). Tokarev v ráži 22 LR // «Střelecká revue», 5, 2007