A carbine prototype was also produced; it has a single trigger, slightly longer barrel, and adjustable sights up to 800 meters, despite using the same weak cartridge; an exemplar of both variants can now be found at the Military Historical Museum of Artillery, Engineers and Signal Corps in Saint Petersburg.

[3] Only a handful of these submachine guns had been ordered for trial purposes, when in July 1928 the Soviet Army leadership decided that a single new automatic cartridge should be developed for both automatic pistols and submachine guns, to be obtained by modifying the 7.63×25mm Mauser round down to the Soviet machinery standard of 7.62 mm.

Eventually, in Feb 1931, the army ordered 500 Tokarevs chambered in the revolver round, to be sent to the troops for more extensive trials.

[1] The number of Tokarev submachine guns (chambered in the Nagant round) actually produced and delivered remains uncertain.

The army commission eliminated the guns of Korovin, Prilutsk and Kolesnikov as unsatisfactory due to their unreliable cycling.