This is a F.A.B. Vertical Foregrip known as the T-FL, model FX-TFLT.
The T-FL 7-Position Vertically Folding Foregrip quickly transforms from a horizontal grip into a vertical grip by the push of a button and provides enhanced versatility" grip and functionality.
Features:
Fits all 1913 Picatinny or weaver rails
Convenient waterproof storage compartment
Foregrip folds to any of seven angles
