ProMag Industries MAG 07 offers reliable and high-performance magazines designed for serious firearms enthusiasts. Crafted with precision, these magazines feature heat-treated chrome silicon wire springs for unmatched durability and consistent reliability. Each MAG 07 is manufactured and assembled in the USA, ensuring robust quality control during every stage of production. Heat-Treated Chrome Silicon Wire Spring Manufactured & Assembled in the U.S.A Easy Loading Rugged Construction Choose ProMag MAG 07 for your firearm needs, backed by a lifetime guarantee against defects.