KRISS USA, Inc Magazine, 9MM, 40 Rounds, Fits Kriss VECTOR, Black KVA-MX290BL00 The KRISS Mag-Ex2 extended magazine is a fully assembled Mag-Ex Kit 2 with a factory standard Glock Magazine. The Mag-Ex 2 is the perfect match of reliable feeding, toughness, and aesthetics for the KRISS Vector. The Mag-Ex 2 is available in 9mm and 10mm; for an overall capacity of 40 rounds of 9mm, and 33 rounds of 10mm for your KRISS Vector Glock handgun and your Glock magazine-compatible pistol caliber carbine.