This is a KCI® .40 S&W 31-round extended magazine for Glock® 22, 23, 27, and 35 pistols.
KCI’s Glock-compatible magazines allow you to stock up for training without breaking the bank or having to worry about putting wear-and-tear on your magazines. These 31-round high-capacity magazines feature polymer and steel construction, just like standard factory magazines, and are designed to work with Glocks that have the ambidextrous mag release (Gen 3, 4, and 5). Internal springs are made from heat-treated chrome silicon wire, and like many new extended magazines might need to be loaded and reloaded several times before accepting full capacity. All extended magazines can be difficult to load at first, which is why we always recommend grabbing a dedicated magazine loader to give you more trigger time and minimize stress on equipment. Either way, these magazines will gradually become easier to load over time.
