The FN 509 Compact MRD pistol in 9mm and black finish (brand part no. FN 66-100572) packs full-size performance into a compact, optics-ready frame built around FN’s patented Low-Profile Optics Mounting System. FN America builds the pistol with a 3.7-inch cold hammer forged stainless steel barrel and a recessed target crown, and all-black co-witness iron sights align with a mounted red dot. The improved flatter-face trigger allows for a more controllable press, and two 10-round magazines with improved backstrap texturing ship with the pistol; the platform also accepts higher-capacity FN 509 magazines. Among optic-ready semi-auto handguns, this 509 Compact configuration favors concealed carriers who want full-size 509 features in a smaller frame.

Key Specifications

• The chambering is 9mm, and the capacity is 10 rounds (compatible with higher-capacity FN 509 magazines).
• The barrel measures 3.7 inches, cold hammer forged with a recessed target crown.
• The sights are all-black co-witness iron sights, aligning with a mounted optic.
• The trigger is an improved flatter-face design for a more controllable press.
• The controls are fully ambidextrous.
• Two 10-round magazines with improved backstrap texturing ship with the pistol.
• The unloaded weight is 25.5 ounces.
• The slide is optic ready/serrated.
• The action is Semi-Auto.

Frequently Asked Questions

Can this pistol accept higher-capacity magazines? Yes, it’s compatible with FN 509 17-round and 24-round magazines using the appropriate sleeves.

Do the iron sights co-witness with a red dot? Yes, the all-black co-witness iron sights align with a mounted optic.

Buy the FN 509 Compact MRD Pistol, Black

Full-size 509 features in a concealable compact frame are exactly what this pistol delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.