This fn magazine sleeve is compatible with the 509 mid-size 17rd 9mm luger magazine.
Caliber: 9mm Luger
Capacity: 17
Finish: Black
Model: Mag Sleeve
Material: Polymer
Model Fit: 509M
Brand Fit: FN
Capacity: 17
Caliber: 9mm Luger
Capacity: 17
Finish: Black
Model: Mag Sleeve
Material: Polymer
Model Fit: 509M
Brand Fit: FN
Capacity: 17