KRISS USA, Inc, Vector Angled Grip, Fits 1913 Picatinny Rails, Black Polymer Construction Improved Ergonomics Fits all Standard 1913 Picatinny Rails The KRISS Angled Grip will add a gentle contour to the front of the Vector lower receiver. This attachment will provide a secure location to grip the Vector with the support hand and also provide some separation from the controls to help prevent accidental activation of the magazine release and/or bolt catch. The grip is made from a durable and lightweight polymer, and secures firmly with a hex screw