The Okay® Surefeed E2 AR-15 .223 Rem / 5.56 30-Round Magazine 10-Pack includes 10 ultrareliable, Mil-Spec magazines with hard-coat anodized, heat-treated aluminum bodies for superior corrosion resistance and lasting durability in challenging environments. Mil-Spec stainless steel springs and 4-way, anti-tilt followers ensure smooth, snag-free feeding, while a Mil-Spec dry film lubricant on the interior and exterior of each magazine delivers smooth operation for long-lasting, reliable service. Better yet, this pack of 10 magazines is ideal for chest rigs, plate carrier setups, battle belts, and other tactical rigs for civilian training, military operators, law enforcement personnel, and more. Made in USA.