This is the genuine article—the factory magazine that Glock engineered for its fifth-generation pistol lineup. Built to the same exacting standards that have made Glock a fixture in duty holsters and competition rigs worldwide, this magazine delivers the reliability you expect from the manufacturer.
Glock factory magazines are engineered for durability and consistent feeding. New magazines may require a brief break-in period—this is normal and expected. The magazine spring needs time to settle.
Break-in procedure: Load the magazine with 16 rounds (leaving the last round out) and allow it to sit for several days. This lets the spring compress naturally. You can also cycle the magazine from full to empty multiple times to accelerate the process. After break-in, the magazine will load smoothly to full capacity.
These are genuine Glock factory magazines, the gold standard for reliability and longevity.