Made in the usa, the pmag 10 5.56 ac is a polymer 5.56x45 nato 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.It features gen m3 technology, including a self-lubricating follower, a stainless-steel spring, and constant-curve internal geometry for smooth feeding.It also incorporates offset feed lip geometry that maximizes bolt face engagement, guaranteeing reliable feeding and solving the bolt face issue common to other aics-pattern magazines for 5.56 based cartridges.Caliber: 5.56x45mm NATOCapacity: 10rdFinish: BlackModel: PMAGMaterial: PolymerModel Fit: AICSCapacity: 10