This is a factory FN 509C 12-round extended magazine in 9mm.

Crafted from lightweight steel, this magazine double stacks 12 rounds atop a steel internal spring and high visibility polymer follower.

And don’t forget the neat pinky extension – much better grip.

The FN 509C is the newest EDC handgun from FN America. This FN 509 handgun is the right size for concealment while still retaining the ability to carry 15 rounds. It comes standard with the FN low profile optics mounting system. This firearm is compatible with the larger capacity 509 magazines such as the 17 and 24-round mags. The gun includes two different size backstraps to ensure the best fit in a wide variety of hand sizes.