This is a new Magpul Industries PMAG 10 5.56 AC 10-round magazine. The PMAG 10 5.56 AC is a polymer 5.56x45 NATO (.223 Remington) magazine designed for short action Accuracy International Chassis Systems (AICS)-pattern bottom metal, including the Bolt Action Magazine Well for the Magpul Hunter family of stocks. This features a single stack, constant-curve internal geometry with 10-round capacity, paint pen dot matrix panels on the bottom of the body to allow for visual identification, and next-generation impact and crush-resistant polymer.