This is a Advanced Technology Grip, model FPG0100.
The Advanced Technology Int. Forend Pistol Grip fits a standard Picatinny Rail. It is a three-position textured grip with an ergonomic design that gives you extra support and stability when shooting. It installs onto a standard Picatinny Rail (not included). Manufactured in the USA.
Features:
Fits a standard Picatinny Rail
Textured grip
Ergonomic design