Open Box Deep Discount This listing is for one brand new, unused Taurus GX4 Magazine 9mm 13 rd.. The item has damaged packaging or an opened box, so we are selling it at a deep discount. Quantity is limited to what is shown, and the item ships in its current packaging. 11-round magazine with +2 extension for the Taurus GX4. The mag extension elongates grip for a more secure hold.