BudsGunShop.com - This brace

Hi Joey and welcome. No Sir. The KRISS Vector folding stock assembly kit is designed to attach only to Gen 2 2017 or newer models of the KRISS vector bodies. Note:
ALL NFA RULES APPLY!!!

Joey, no if you are attaching it to Vector GEN II 2017 Upper Receiver.
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.