The FN 509C is a compact 9mm Luger double-action semi-automatic pistol with a 4.02-inch barrel and 10+1 capacity. Overall length is 11 inches and weight is 1.6 lbs. The Flat Dark Earth finish covers the frame; the grip is standard type. It ships new in box. 
 

Key Specifications 

• SKU: 2024014362 
• UPC: 845737017859 
• Brand: FN 
• Model Name: 509C 
• MPN: 66101795 
• Caliber: 9MM Luger (9x19 Para) 
• Capacity: 10+1 Rounds 
• Length: 11 inches 
• Barrel Length: 4.02 inches 
• Weight: 1.6 lbs. 
• Grip Type: Standard 
• Trigger Type: Standard 
• Finish Color: Flat Dark Earth 
• Condition: New in Box 
• Action Type: Double Action 
   

Detailed Features 

The 509C's double-action trigger delivers a consistent pull suitable for both defensive use and regular practice. At 1.6 lbs and 11 inches, it carries comfortably and conceals reasonably well under most cover garments. The 4.02-inch barrel is on the longer side for a compact pistol, which helps accuracy without making the gun unwieldy. The FDE finish is practical for grip retention and blends with common tactical gear colors. 
 

Usage Scenarios 

The 509C works for concealed carry, home defense, and range use. The 10+1 capacity is adequate for most carry purposes. Shooters who want more rounds often use the 509C with flush-fit magazines for carry and extended mags on the range. The double-action trigger suits shooters who prefer a heavier initial pull for safety reasons during carry.

The FN 509C FDE generates broadly positive feedback centered on ergonomics, reliability, and the FN brand's reputation.

Grip feel and comfort are the most consistently praised attributes. Owners describe it as natural in hand with secure purchase during recoil. The FDE finish gets favorable comments for its appearance and texture contribution.

Reliability across ammunition types is a recurring theme - owners report consistent feeding and minimal malfunctions across different 9mm loads, which matters for a defensive pistol.

Accuracy at defensive and moderate range distances is well-regarded. The longer-than-average barrel for the compact class contributes to this.

Criticisms tend to focus on size perception (some buyers find it larger than expected for a "compact" label, which affects holster selection and concealability), trigger feel (opinions split between those who find it adequate and those who want a crisper break), and capacity (owners in jurisdictions without restrictions sometimes wish for higher-round options). Price is a common comparison point against similar platforms from other manufacturers.