Stainless steel construction Corrosion- and glare-resistant black finish Steel wire spring Injection-molded polymer follower Ambidextrous witness holes Get factory reliability for your FNA(R) 509(TM) Compact pistol with the FN 509 Compact 9mm 12-Round Magazine from GunMag Warehouse. 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 for quick, intuitive round counts while on the move. Stock up on FN 509 magazines today and enjoy reliable firepower at a low, budget-friendly price.