The Magpul PMAG 10 GL9 – Glock G17 and G19 9×19 Parabellum are the highest performing and most reliable restricted capacity magazines on the market. They are designed to provide the same quality and performance of the proven Magpul PMAG series of Glock magazines while also providing a viable product solution to those in locations and situations where a 10-round capacity restriction is required or desired. Whether for competition use or otherwise” the PMAG 10 GL9 is the highest quality restricted capacity magazine option available.