FN 509 Midsize 9mm Luger FDE, 4 in Barrel, Striker-Fired, Ambi Controls, 15+1, U.S.-Made, Includes 4x 15rd Mags
This FN 509 Midsize stands out with its FDE slide and frame, U.S.-made slide marked "FN COLUMBIA, SC USA," and a balanced 4-inch configuration that pairs full-capacity performance with midsize dimensions. It comes with four 15-round magazines and features fully ambidextrous controls, a cold hammer-forged stainless barrel, and fixed steel sights. The slide is not optics-ready.
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 scratches and blemishes present. No optic cover plate is installed on the slide.
What’s Included
- 4x 15-round FN 509 steel magazines
- FN 509 OEM optic cover plate (no screws or adapters)
The 4-inch cold hammer-forged stainless steel barrel with a flush crown supports durability and consistent accuracy. Paired with a striker-fired action, the 509 Midsize delivers a clean, predictable trigger in a compact, duty-capable package.
Ergonomics are well-addressed with interchangeable backstraps and aggressive grip texturing for secure control. Fully ambidextrous controls include the slide stop and magazine release, making the pistol adaptable for left- or right-handed use.
The FDE-finished slide features front and rear cocking serrations for confident manipulation, and the fixed steel sights are dovetailed front and rear. An integral three-slot MIL-STD-1913 accessory rail provides space for compatible lights or other accessories.
Dimensionally, the factory midsize format runs approximately 7.4 inches in overall length, 5.2 inches in height, and 1.35 inches in width, with an unloaded weight around 26.5 ounces. Capacity is 15+1 in 9mm Luger. The slide is not optics-ready.
Manufactured in the USA, this example carries the "FN COLUMBIA, SC USA" slide marking and comes with four 15-round magazines to keep you range-ready.