Experience unparalleled reliability with the ProMag RUG14, a USA-made rugged magazine designed for consistent performance in high-stakes situations. Engineered with precision, this magazine features a heat-treated spring that enhances durability, ensuring optimal functionality even in challenging environments. Heat-Treated Chrome Silicon Wire Spring Manufactured & Assembled in the U.S.A. Easy Loading Rugged Construction Upgrade your shooting experience with the assurance of a lifetime guarantee against manufacturer's defects.