This is yet another creation of the Techkrim company from Izhevsk - .345 TK “smoothbore” ammunition intended for use in weapons that are legally classified as “shotguns” per Russian laws (with Paradox or Lancaster bores). Technically it is a rough equivalent to 9x19 Luger, and most probably it will be used in converted (re-barreled) pistol caliber carbines which would sell on a ‘shotgun’ license rather than rifle license.
Round based on 5.45x39 steel cases cut down to 22mm and loaded with projectiles with nominal diameter of 8.8mm. COAL would be about the same as for 9x19, so it would fit into magazines originally intended for 9mm Luger/Para. Projectiles will be available in solid zink, JHP and FMJ versions with weights ranging from 7.5 and 9.5 gram.
source and more photos: https://www.kalashnikov.ru/gladkostvolnyj-pistolet-kalibr-345-tk