The ProMag FNH-A6 17-Round Magazine for FN 509 9MM Pistol combines durability with unparalleled performance. Designed for serious shooters, this magazine ensures reliable feeding and smooth operation. Constructed from heat-treated steel with a sleek black oxide finish, it promises long-lasting use. The precision-wound magazine springs enhance reliability, so you can focus on your target. 17-Round Magazine Fits FN 509 9MM Pistol Magazine Body Constructed of Heat Treated Steel with Black Oxide Finish Injection Molded Magazine Follower Magazine Spring Formed From Heat Treated Chrome Silicone Wire Made in the U.S.A. Experience unmatched quality and performance with ProMag's lifetime warranty.