Experience reliability and performance with the ProMag Industries GLK-13 Magazine, engineered for optimal functionality in every scenario. Constructed from heat-treated chrome silicon wire, this rugged magazine guarantees consistent feeding and durability, essential for accurate shooting. Backed by a lifetime guarantee against manufacturer's defects, it epitomizes quality and craftsmanship. Heat-Treated Chrome Silicon Wire Spring Manufactured & Assembled in the U.S.A. Easy Loading Rugged Construction Elevate your shooting experience with the reliability of the ProMag GLK-13 Magazine.