The FN 509 F MRD-LE 9mm is the full-size, duty-rated FN 509 with an optic-ready slide, no manual safety and tritium night sights (brand part no. 66-101345LE). FN’s Low-Profile Optics-Mounting System takes common duty-rated red dots, and the 4.5-inch hammer-forged barrel is target crowned. A conical striker and a flat-faced trigger breaking at 90 degrees come from the 509 LS Edge. FN America ships it in black with three 17-round magazines and four optic mounting plates. It is a duty-style pistol for shooters who want a red dot.

Key Specifications

• The chambering is 9mm, the standard duty cartridge.
• The slide is optic ready with the FN Low-Profile Optics Mounting System and four MRD mounting plates included.
• This model has no manual safety, with a drop-safe, duty-rated fire control group.
• Sights are 3-dot tritium night sights that co-witness with a mounted optic.
• Magazine capacity is 17 rounds, and three magazines are included.
• The barrel measures 4.5 inches and is hammer forged with a target crown.
• The trigger is a flat-faced design with a pull of 4.5 to 6 pounds.

Frequently Asked Questions

Does the FN 509 F MRD-LE have a manual safety? No. FN lists it as a no manual safety model with a drop-safe, duty-rated fire control group.

What comes in the box? Three 17-round magazines, three interchangeable backstraps, four MRD mounting plates, a locking device and an FN ballistic case.

Does it have night sights? Yes. It has 3-dot tritium night sights that co-witness with the mounted optic.

Buy the FN 509 F MRD-LE Pistol, 9mm, Optic Ready, No Manual Safety, Night Sights, Black, 17-Round

A duty-rated trigger, tritium sights and a direct-mount optic system set this full-size 509 apart. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and browse more semi-auto handguns while you are here.