FIVE Factory Original Sig Sauer Mag Packs. Each Pack Contains Two Polymer 30 Round AR-15 Magazines with Connector.  You Will Receive a Total of 10 AR Magazines and Five Connectors that Will fit any AR-15 in 5.56/.223 Caliber! The magazines are held together with a connector which allows you to carry 60 rounds in the weapon. Extra mag packs can be purchased and connected to increase your capacity to 90 or 120 rounds! These are no longer produced and very hard to find.