According to TFB reader Mac21500, the civilian version of the 9mm PP-19-01 Vityaz submachine gun has hit the European market. Apparently, the weapon is available for under $1000 (it’s unclear whether that’s USD or something else). The magazines are limited to ten rounds to comply with most European laws.
The Vityaz has been in production since 2007. It operates as a closed bolt, blowback submachine gun, but otherwise is based on the more famous “Bizon” submachine gun, itself derived from the AKS-74U subcarbine. Like many 9x19mm submachine guns, the Vityaz is capable of firing high pressure ammunition, in this case the very high pressure Russian armor piercing 7N21 round.
Further pictures are available in an imgur album.