FN America FN 509 Full-Size 9mm Luger, 4-inch Cold Hammer-Forged Barrel, Black, Ambidextrous Controls, 17+1 Capacity, Fixed Sights, USA-Made
This FN 509 is a full-size, striker-fired 9mm built in Columbia, South Carolina, and set up in the standard (non-MRD, non-Tactical) configuration. It features a 4.0-inch cold hammer-forged barrel with a recessed target crown, fully ambidextrous controls, and an integral MIL-STD-1913 rail. The slide carries front and rear cocking serrations, fixed three-dot-style sights with a white-dot front, and FN 509 markings with the FN logo. It comes with three 17-round magazines and both an original case and an FN-branded soft zippered pistol case.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are minor handling marks from previous use. The bore is bright and clean. Refer to the photos for further detail.
What’s Included
- FN-branded soft zippered pistol case
- Original case
- Three 17-round double-stack steel magazines with witness holes
The 4.0-inch steel barrel is cold hammer-forged and finished with a recessed target crown, a durability-focused feature that supports consistent accuracy. The barrel is non-threaded, matching the standard 509 setup.
The full-size polymer frame is finished in black with molded textured panels and backstrap ribs. It includes an integral Picatinny/MIL-STD-1913 dustcover rail with four slots for mounting compatible accessories.
Controls are fully ambidextrous, with both the slide stop and magazine release operable from either side. The two-piece striker-fired trigger incorporates an integrated safety lever, complemented by internal passive safeties and a trigger safety.
The slide includes front and rear cocking serrations and an external extractor. Sights are fixed iron units: a dovetailed white-dot front post and a drift-adjustable square-notch rear.
Designed from FN’s entry in the U.S. Army MHS program, the 509 platform has an extensive test history. This example is marked “FN COLUMBIA, SC USA,” with “509” and the FN logo on the slide, and it features a serialized plate with a QR matrix on the underside of the dustcover rail. The full-height grip is built for 17-round magazines, providing a 17+1 capacity.