DuraMag AR-15 Magazine Features The DuraMag Magazine is built with a Speed body construction from 6061-T6 aluminum a material chosen for its strength to weight ratio and resistance to the dents and cracks that can affect other magazine materials. The type III hard coat anodizing process gives the magazine its bronze color as part of the metal itself rather than relying on paint or an applied coating that can chip or wear away with use. This anodizing also adds a layer of corrosion resistance helping the magazine hold up over years of storage and field use. Built to the USGI pattern the magazine maintains compatibility with the wide range of AR-15 and AR pattern rifles that accept this standard magazine profile. Unlike polymer magazines that can flex or swell when left loaded for extended periods the all aluminum DuraMag body resists deformation making it a dependable choice for long term magazine storage. This is particularly valuable for shooters who keep loaded magazines on hand for defensive or duty purposes over extended timeframes. Chambered to run both 5.56 and .300 AAC Blackout the magazine offers flexibility for shooters who run multiple AR builds or swap barrels between calibers. For a durable dependable 10 round magazine built to USGI specifications the DuraMag Magazine is available for sale at GrabAGun. DuraMag AR-15 Magazine Specifications Manufacturer: DuraMag Model: USGI Speed Magazine Caliber: 5.56 / .300 AAC Blackout Capacity: 10 Rounds Color: Bronze Material: Aluminum Style: USGI Available At: GrabAGun