Stainless steel construction Corrosion- and glare-resistant black finish Steel wire spring High-visibility polymer follower Extended polymer floor plate The FNA(R) 509A(R) Compact 9mm 10-Round Magazine is a genuine FN factory magazine, designed to deliver consistent operation and jam-free feeding performance with your compact FN pistol. Precision-machined from stainless steel for maximum durability and lasting corrosion resistance, this magazine is built to withstand years of heavy use and abuse in fast-action tactical and personal defense applications. The glare-resistant black finish provides additional corrosion resistance and improved field reliability, while the steel wire spring and high-visibility follower work together to deliver consistent cartridge alignment and jam-free operation - even when fully loaded. Ambidextrous witness holes offer quick, visual round counts for improved reliability, and the extended polymer baseplate offers additional grip area for improved comfort and control without compromising concealability. Better yet, the polymer floor plate is easily removed for quick disassembly when maintenance and cleaning are required. Don't wait! Pick up an extra 509 magazine or two today and carry in complete confidence, no matter where you are!