R9-Arms submachine gun

The R9-Arms Submachinegun is a select fire submachinegun chambered in 9×19mm Parabellum. The R9 is notable for being produced by the nonexistent R9-Arms Corp. USA for sale to criminal organizations around the world. Unlike most improvised firearms, the R9 is not a copy of an existing weapon design, nor a low quality insurgency weapon such as the Błyskawica.

While the markings on the gun claim that it is from the USA, they are likely just an attempt to gain credibility or baffle local law enforcers.

History
Not much is known about the R9, although a few have been seized in the Netherlands. In 2012, a truck driver smuggling drugs from the Netherlands into the UK was arrested with an R9-Arms submachine gun outfitted with a suppressor. In July 2015, a large number of R9-Arms submachine guns were seized in Croatia.

An example has allegedly been seized in the United States.

Speculation as to the gun's origin
There is much speculation as to where the gun is being produced, if it is still being produced at all. The most plausible theory is that they were produced in Croatia, because of its status as an ex-Soviet country and due to the number of R9-Arms submachine guns confiscated there. Furthermore, Croatia is and has been the home of a number of illegal arms manufacturers, such as Mirko Vugrek and his son, Ivan Vugrek.