D&H Industries has been a government contractor for USGI 30 round magazines and also has been the largest supplier of magazines to the Israeli Defense Force. D&H has been in magazines for decades and has a dedication to product quality and a rigorous QC program that includes periodic reliability testing involving thousands upon thousands of rounds fired to run random magazines through simulated life-cycles adhering to strict reliability standards for various contracts. They make a quality 30 round magazine with a durable grey hardcoat anodized teflon impregnated finish. Unlike Polymer magazines which can be great in one batch and then invisibly cost reduced by bean counters via a material or internal geometry change resulting in brittle flexible or otherwise failure-prone product the D&H / USGI style magazine is a consistent quality product that is not subject to dramatic specification change over time.