Shield Arms: Glock(R) 9mm 15rd Black Mag, 43x/48 w/ Steel Mag Release

Kit Contents. (1) Gen 3 S15 magazine - 15rd . (1) Glock(R) 43X / 48 steel mag catch black nitride. Coating: . QPQ Nitrocarburizing Surface Treatment. 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