Molot VPO-209

The Molot VPO-209 is a Russian "shotgun" manufactured by Molot-Oruzhiye, and chambered in .366 TKM. It appears to be based on the AKM, and is strictly semi-automatic for the civilian market. It seems that it is typical for Molot to repurpose existing surplus AKM series rifles by either rechambering / boring them out (or replacing the barrel), limiting them to semi-auto, according to ModernFirearms.net. Finally, the repurposed firearms are sold to the civilian market - as opposed to manufacturing completely new firearms.

Despite appearance, the VPO-209 is actually considered a shotgun due to Russian firearm regulations, where smooth bore firearms are classified as such. Likewise, the cartridge it fires (the .366 TKM) is of course also classified as a shotgun cartridge, despite largely firing solid bullets ("slugs"). According to this article at ModernFirearms.net this shotgun utilizes a Paradox bore, which starts smooth from the chamber end, with some actual rifling grooves toward the muzzle - the final 12 centimeters (~4.75 inches) in the case of the VPO-209.