The ProMag FN 509 drum magazine holds 50 rounds of 9mm ammunition in a compact drum configuration designed for the FN 509 pistol series.
- Caliber: 9mm Luger
- Capacity: 50 rounds
- Compatible Firearms: FN 509, FN 509 Tactical, FN 509 Midsize, FN 509 Compact
- Material: Polymer body with steel internals
- Finish: Black
- Follower Type: Drum feeding system
- Includes: Loading tool
