The ETS Glock Magazine is a next-generation Glock 40-round magazine that brings you features you may never have considered before. The ETS 40-round Glock mag isn't just your run-of-the-mill high-capacity magazine; it's chemical-resistant, and the advanced polymer won't degrade from chemical contact or exposure to UV light. The ETS Glock 18 – 9mm 40-round magazine offers extreme impact resistance even in hot or very cold operating environments. Right to Bear is proud to put this high-capacity translucent Glock magazine in your hands. Trust its performance and know how many rounds you have left because you can see them. What more could you ask for?