The Goblin is a compact concealable folding submachine gun

Submachine gun

A submachine gun is an automatic carbine, designed to fire pistol cartridges. It combines the automatic fire of a machine gun with the cartridge of a pistol. The submachine gun was invented during World War I , but the apex of its use was during World War II when millions of the weapon type were...

 prototype developed in the 1990s by the KB-ST design bureau in Kiev

Kiev

Kiev or Kyiv is the capital and the largest city of Ukraine, located in the north central part of the country on the Dnieper River. The population as of the 2001 census was 2,611,300. However, higher numbers have been cited in the press....

, Ukraine

Ukraine

Ukraine is a country in Eastern Europe. It has an area of 603,628 km², making it the second largest contiguous country on the European continent, after Russia...

. It was a derivative of the unsuccessful Russia

Russia

Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

n PP-90

PP-90

The PP-90 is a Russian 9 mm folding submachine gun, developed by the KBP Instrument Design Bureau in Tula for use with special units of the Russian Ministry of Internal Affairs...

, itself a copy of the American

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 Ares FMG

ARES FMG

The ARES FMG is a folding submachine gun designed by Eugene Stoner while he was an owner of ARES Incorporated. Stoner designed the gun for concealment and covert use, describing it as a “businessman’s personal defense weapon”...

prototype from 1986. The Goblin was never produced.

Notable differences from the PP-90 include a folding rear sight mounted on the stock arm, and a very short foregrip.