Get factory reliability for your FN® 509™ Compact with this 12-round factory magazine. FN 509 magazines are crafted from stainless steel and feature a black flat black finish for a low-profile look. The extended base plate is made of resilient polymer and textured to match the frame for slip resistance. A high-visibility follower makes it easy to quickly identify an empty magazine and works in concert with the set of ambidextrous witness holes, which allow shooters to quickly check their remaining ammo.