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 10mm, for an overall capacity of 33 rounds of 10mm for your KRISS Vector, Glock handgun, and your Glock magazine-compatible pistol caliber carbine.