FN America 509 Midsize 9mm Luger 17 Round Magazine Mag Sleeve 1 Pack Stainless Steel 15RD. Specifications for FN America FN 509 Midsize 9mm Luger 15 Round Pistol Magazine: Manufacturer: FN America Gun Make: FN Herstal Gun Model: FN 509 Caliber: 9mm Luger Magazine Capacity: 15 Round Color: Black Fabric/Material: Stainless Steel Package Contents: FN America FN 509 Midsize 9mm Luger 15 Round Pistol Magazine What firearm models does the manufacturer say FN America FN 509 Midsize 9mm Luger 15 Round Pistol Magazine is compatible with? The manufacturer says that FN America FN 509 Midsize 9mm Luger 15 Round Pistol Magazine is compatible with FN 509FN America 20100348-15RD: 509 Midsize 9mm Luger 17 Round Magazine Mag Sleeve 1 Pack Stainless Steel