F.A.B. Defense VTS Versatile Tactical Support, Fits Picatinny Rail, Black FX-VTSB The VTS Versatile Tactical Support provides a large variety of solutions for forward grip positioning" enhancing comfort and increasing accuracy. This ergonomic support can be set in multiple locations for a wide variety of tactical needs and ideal operational superiority" taking in mind ideal compact configuration. Fits any Picatinny rail interface.