KRISS USA, Inc, Magazine Extension, 9MM, +23 Rounds, Alpine White, Fits Kriss VECTOR WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov. Precise Manufacturing Long Term Reliability Durable Construction High quality components and precise manufacturing make Kriss Vector parts ideal for maintaining and upgrading firearms. The durability, reliability and excellent build quality of these parts will ensure years of service you can count on.