This is OEM equipment made outside of Izhevsk not far from the world-famous Izhmash weapons factory. The highest quality on the market, STK accessories are made out of armamide, the base component of Kevlar. There are cheaper plastic versions on the market but if you value quality you'll find no better choice. The folding grip can be mounted on any firearm with a bottom rail on the forend using its unified quides which attach to any Picatinni rail. The grip is fixed on the forend by a mounting screw. It allows significantly improved aim and control while shooting and has two positions: horizontal and vertical. To change position of the grip press down the spring-loaded lock lever inside of the grip bottom. When horizontal you can hold the firearm like normal. When vertical you instantly have a pistol grip for improved vertical and lateral control.