Enhanced Every Day Carry 9mm.
Low Profile Optics Mounting System.

This evolution of the FN 509 Midsize, now featuring the FN Low Profile Optics Mounting System, gives you the option of direct mounting more than 10 different miniature red dot optics to your concealed carry pistol.

New Flatter Faced Trigger.
Standard 15 Round capacity Firearm.

The FN 509 Midsize MRD features a four-inch barrel and slide with optics mounting package, a midsized frame, standard 15-round capacity and is compatible with larger capacity FN 509 magazines with use of a sleeve. The improved controls aid in manipulation, the new improved texturing on the two included backstraps provides better recoil management, and a new flatter faced trigger allows for more controllable trigger press and cleaner break.

Cold Hammer Forged Stainless Steel Barrel.

This pistol features easily racked combat-style sights, an external extractor, loaded chamber indicator, and a MIL-STD-1913 accessory mounting rail. Also included are a high visibility low-friction follower, fully ambidextrous slide stop lever and magazine release and a cold hammer-forged stainless steel barrel.

FN 509M Midsize 9mm Pistol Specs

Manufacturer: FN

Model: 509 Midsize

Caliber: 9mm Striker Fired

Operation: Double-action

Barrel Length: 4.0"

Twist Rate: 1:10" RH

Trigger Pull: 5.5 - 7.7 lb

Sight Radius: 5.79"

Interchangeable Backstraps: Yes

Front and Rear Slide Serrations: Yes

Optic Mounting System: Yes

Two 15-Round Mags: Yes

Ambidextrous Controls: Yes

FDE Polymer Frame: Yes

Height: 5.3"

Overall Length: 7.4"

Width: 1.35"

Weight: 26.5 oz

UPC: 845737011567

SKU: 66100741