This is the ProMag FN 509C 9mm 12-round magazine.

Save money without sacrificing quality with this 12-round aftermarket magazine from ProMag! 

Constructed from heat-treated steel and finished with a black oxide coating, the durability and corresponding corrosion resistance are off the charts! Ensuring your 509 Compact is always ready to go, the injection-molded polymer follower keeps every round perfectly aligned within the steel feed lips. 

Additionally, a lifetime warranty backs all ProMag magazines, so you’ll never have to worry about running these magazines hard. From concealed carry to a weekend range trip, these 12-round magazines are more than capable of handling the task!  

These are sure to sell quickly, so add some to your cart before you forget!