KRISS USA's Vector Ambidextrous Folding Stock is designed for the Vector GEN II 2017. The stock is constructed of steel"" aluminum"" and advanced polymer composites. The KRISS Vector Ambidextrous Folding Stock secures to the upper receiver with a push button hinge that will fold to the right"" this hinge can also be configured to fold to the left. The stock features two QD sling swivel mounts on the left and right side"" as well as a sling loop towards the rear. In addition to folding"" this stock is also telescopic"" adjusting to three positions. This item is classified as a stock and will convert a Vector SDP (pistol) into a Short Barreled Rifle. This stock is only compatible with the KRISS Vector GEN II 2017 Upper Receiver.