DURAMAG designs stainless steel magazines to meet the needs of today's combat conditions. These stainless steel magazines are extremely durable and dependable, and routinely outperform the mil-spec aluminum magazines in almost every test. Constructed from 400 series stainless steel and combined with a specialized heat treatment process, these magazines are one of the best in the industry today. DURAMAG magazines feature an anti-tilt follower and a Black-T Teflon coated finish. They feature increased interior dimensional room which enhances proper stacking of the rounds, dramatically reducing jams.