The ProMag Industries GLK-A13 Magazine combines performance and durability, featuring a robust 27-round capacity designed for reliable feeding in high-stakes situations. Manufactured in the USA, each magazine undergoes rigorous quality control to ensure unmatched reliability and longevity. The precision-wound springs, made from heat-treated chrome silicon wire, promise consistent functionality. 27-Round Capacity Precise Manufacturing Long Term Reliability Durable Polymer Construction Enjoy peace of mind with a lifetime warranty against manufacturer defects.