After careful testing and consideration, we’ve found the perfect solution for carrying a spare magazine on the Kenai Chest Holster. We experimented with all kinds of Kydex and Nylon pouches and chose this pouch over a ton of options. It’s a Nylon single mag pouch that fits everything from single stack 9mm magazines to double stack .45 ACP magazines. It even retains knives, multitool, and flashlights.