ASC Stainless Steel .223 Remington magazines made to have the highest durability and increased longevity on the market. ASC mags are made from start to finish right here in the USA using 410 Stainless Steel Alloy, they are heat treated for superior strength and lasting endurance. They are chemically treated for corrosion resistance and coated with a proprietary finish. They also have a chrome silicon springs, enhanced anti-tilt polymer followers, and 300 series stainless steel floor plate powder coated in matte black.#html-body [data-pb-style="62DF8287821A3"]{justify-content: flex-start; display: flex; flex-direction: column; background-position: left top; background-size: cover; background-repeat: no-repeat; background-attachment: scroll; border-style: none; border-width: 1px; border-radius: 0px; margin: 0px 0px 10px; padding: 10px;}#html-body [data-pb-style="62DF8287821AF"]{border-style: none; border-width: 1px; border-radius: 0px; margin: 0px; padding: 0px;}