Strap up and carry in confidence with the Warne® Scope Mounts Extended Base Pad for Glock® 17/22 +5/4 from GunMag Warehouse. Constructed of durable, yet lightweight CNC-machined 6061 aluminum with a corrosion-resistant anodized finish, this magazine extension offers improved ergonomics and shock resistance, while simultaneously maximizing your factory Glock magazines’ overall capacity for optimal firepower in self-defense or combat applications. Better yet, this aftermarket mag extension is incredibly easy to install for battle-ready performance, right out of the box! Compatible with factory Glock magazines ONLY.