KCI USA is a well-known importer of South Korean manufactured firearm magazines. These magazines are known for their reliability, coming from durable materials like aluminum, steel, and polymer. At The Mag Shack, we carry a wide assortment of KCI USA magazines. These included many extended magazines made from quality components similar to the original factory-manufactured magazines with your firearm. We have options for your AR-15, Glock pattern firearms, AK-47 rifles, and others. All of these come at very competitive prices and unmatched service when you order from The Mag Shack. KCI USA also offers a limited lifetime warranty on all their magazines.