ASC Stainless Steel magazines are an improvement on a classic with the highest levels of durability and increased longevity simply the best in the industry! Our magazines are manufactured 100% start to finish in the USA using .020 gauge 410 Stainless Steel Alloy heat treated for superior strength and lasting endurance. Our magazines are chemically treated for corrosion resistance [ref QQ-P-35] and coated with our proprietary finish Marlube which is a wear-in not wear-off coating that burnishes into the surface providing self-lubricating properties.