Stainless steel construction Tumble-polished finish Numbered witness holes Steel wire spring Low-friction polymer follower BlackFlat Dark Earth Steel Specifically engineered for concealed carry applications, the FNA(R) FNS-9 Compact 9mm 12-Round Magazine is a genuine FN factory magazine, designed to deliver smooth, jam-free operation and a snug, wobble-free fit for unparalleled reliability and consistent operation in any tactical or personal defense environment. This centerfire pistol magazine features a durable, laser-welded stainless steel body with a corrosion-resistant finish for lasting strength and superior corrosion resistance in high-stress environments, while the removable polymer floor plate offers a flush-fit design for snag-free carry and lightning-fast disassembly when routine maintenance and cleaning are required. The machined feed lips and enhanced external geometries deliver a precise fit for proper cartridge-to-feed ramp alignment and consistent operation. Plus, the steel wire spring and hi-vis polymer follower work together to deliver smooth operation, even when fully loaded.