When attached to your for-end the Vipertek FE picatinny railmakes it possible to adapt a bipod with a picatinny adapter. You can also utilize the Vipertek FE picatinny rail to adapt a torch or laser. The front hole is elongated to make it easier and more forgiving to adapt to your for-end, and the underside is curved for a more stable fit to your for-end. Included:1 x Vipertek FE picatinny rail