Elevate your shooting experience with the ProMag MAG04 Magazine, crafted for durability and reliability. This USA-made magazine features a rugged design and an innovative easy loading system, designed to enhance your performance at the range or in the field. Heat-Treated Chrome Silicon Wire Spring Manufactured & Assembled in the U.S.A. Easy Loading Rugged Construction Invest in the ProMag MAG04 Magazine for unmatched performance backed by a lifetime guarantee.