Shield Arms S15 Gen 3 15-Round Magazine Kit for Glock 43X/48

The S15 magazine is a Patented, flush-fitting 15 round magazine for the GlockA(R) 43X and GlockA(R) 48. The S15 is a steel magazine, and is the same length as the OEM GlockA(R) 10 round magazine, but holds an additional 5 rounds. QPQ Nitrocarburizing is a type of surface treatment used to enhance the durability and corrosion resistance of metal parts. The process involves heating the metal in a controlled environment, where nitrogen and carbon are introduced to the surface of the metal. This forms a thin layer of a hard compound called "nitrides," which increase the surface hardness of the metal. During the QPQ Nitrocarburizing process, the metal is immersed in a special salt bath and heated to high temperatures. The salt bath contains a mixture of chemicals that release nitrogen and carbon, which penetrate the surface of the metal. The process is carefully controlled to ensure that the nitrogen and carbon penetrate to a specific depth, creating a uniform layer of nitrides on the metal's surfac