The S15 magazine is a patent-pending, flush-fitting 15 round magazine for the Glock 43X and Glock 48. This magazine is made from durable steel and features a black nitrocarburized QPQ finish for corrosion resistance. The S15 maintains the same overall length as the OEM Glock 10 round magazine but holds an additional 5 rounds, providing a 50 percent increase in capacity in the same footprint.Key FeaturesCapacity: Holds 15 rounds of 9mm ammunition.Construction: Made from durable steel with a black nitrocarburized QPQ finish for corrosion resistance.Compatibility: Designed specifically for use with Glock 43X and Glock 48 models.Flush-Fitting Design: Maintains the same overall length as the OEM Glock 10 round magazine.Improvements: New manufacturing processes and raised ribs for better fit and reliability.