FN 509 Midsize 9mm 10-Round Magazine - Black Stainless Steel

The FN 509 Midsize magazine delivers reliable feeding and consistent performance for one of today's most trusted striker-fired pistols. This factory magazine ensures optimal compatibility with FN 509 Midsize pistols while meeting capacity restrictions in regulated states.

What Makes This Different

Factory FN magazines undergo the same rigorous testing as the firearms they feed, ensuring dimensional consistency and material quality that aftermarket alternatives often lack. The stainless steel construction resists corrosion while the polymer follower and baseplate reduce weight without sacrificing durability. Each magazine features witness holes for quick round counting and a removable baseplate for easy maintenance.

Key Features

• Factory FN construction ensures perfect fit and reliable feeding
• 10-round capacity compliant with restricted state regulations
• Stainless steel body with black finish resists corrosion and wear
• Polymer follower and baseplate optimize weight distribution
• Witness holes allow quick visual round count verification
• Removable baseplate enables thorough cleaning and maintenance
• Drop-free design facilitates rapid magazine changes

This magazine maintains the same reliability standards that made the FN 509 series popular among law enforcement and civilian shooters. The 10-round capacity makes it ideal for competitive shooting in limited divisions, concealed carry in restricted jurisdictions, and range training where frequent reloads build proficiency. The stainless steel construction handles extended range sessions and adverse weather conditions without compromising feed reliability.

Technical Specs

• Capacity: 10 rounds of 9mm Luger
• Construction: Stainless steel body with black finish
• Follower: High-impact polymer
• Baseplate: Removable polymer construction
• Compatibility: FN 509 Midsize pistols exclusively
• Features: Witness holes, drop-free design
• Manufacturer: FN America
• Model Number: 20100349

Factory magazines represent the most reliable feeding solution for any firearm, engineered to the same tolerances as the pistol itself. This FN 509 Midsize magazine provides the consistency serious shooters demand while meeting legal requirements in capacity-restricted areas.