The terms “Volkov” and “Chukhmatov” are most closely associated with a submachine gun prototype known as the Volkov-Chukhmatov , according to Gun Wiki and IMFDB. This weapon is characterized by its simple blowback operation and use of a tandem magazine. The receiver design is said to be very similar to a Sten submachine gun. However, only one example of this prototype is known to exist, and information about it is limited.