The Kriss Mag-Ex2 extended magazine for the Glock 21 Gen 2, 21SF and Kriss Vector 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. DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.