Home / Accessory-Magazines / FN MAG SLEEVE FN 509M 9MM 17RD View cart “FN MAGAZINE FN 509M 9MM 10RD” has been added to your cart. FN MAG SLEEVE FN 509M 9MM 17RD$1599 Out of stock SKU: 20-100355 Category: Accessory-Magazines Product ID: 56934 Description Description Sleeve For 17 rd. Magazine Related products SIG SAUER MAG 320/250 SUBCMPCT 9MM 12RD $4999 Springfield Armory MAGAZINE XD-S 40SW 6RD $3099 Ruger 77/17 MAGAZINE 17HORNET 6RD $3795 Sale! Ruger MAGAZINE AMER COMPACT 9MM 10RD $4295 $4191