FN 509 Compact 15rd Base Pad Magazine Extension 9mm Black/FDE

The FN 20100380 base pad extension transforms the standard FN 509 Compact magazine capacity from 12 rounds to 15 rounds while maintaining the pistol's concealable profile. This factory extension integrates seamlessly with existing magazines, providing additional firepower without compromising reliability or function.

What Makes This Different

Unlike aftermarket extensions that can affect feeding reliability, this FN factory base pad maintains the original magazine spring tension and follower geometry. The steel construction withstands repeated drops and impacts better than polymer alternatives. The included magazine sleeve ensures consistent grip texture and prevents pinching during reloads.

Key Features

• Increases capacity from 12 to 15 rounds of 9mm ammunition
• Factory FN construction ensures perfect fit and reliable function
• Steel base pad construction for maximum durability
• Black and Flat Dark Earth color scheme matches FN 509 Compact pistols
• Includes magazine sleeve for seamless grip integration
• Maintains original magazine spring specifications
• Compatible with standard FN 509 Compact magazines

This extension proves particularly valuable for competitive shooting and duty carry applications where maximum capacity matters. The additional three rounds provide extra confidence without requiring a larger frame pistol. The steel construction handles the increased spring pressure from the extended magazine without deformation, ensuring consistent lockup and feeding through thousands of rounds.

Technical Specs

• Manufacturer: FN America
• Model: 20100380
• Caliber: 9mm Luger
• Capacity: 15 rounds (with extension)
• Material: Steel construction
• Finish: Black/Flat Dark Earth
• Compatibility: FN 509 Compact magazines
• Includes: Base pad and magazine sleeve
• UPC: 845737010409

This factory extension delivers the reliability FN users expect while maximizing the 509 Compact's potential. The steel construction and precise engineering ensure long-term performance under demanding conditions.