Promag's mission was to make the best magazine, period. These magazines are made of new-age polymers and heat-treated steel that outperform their competitors in terms of quality, strength, and reliability. Promag is an American pioneer in designing and manufacturing the best rifle and pistol magazines. As a result, Promag is the choice of shooters everywhere. Manufactured in the USA, these magazines are amongst the world's most trusted selection of shooting magazines. Promag's dependable magazines are designed to outlast any other on the market with their tough, heat-treated steel, stainless spring wire, and long-lasting polymer materials.