The FN 509C MRD pistol in black with a 3.7-inch barrel and 15-round capacity (brand part no. 66-100571) is a compact, double-action-only 9mm cut for a mini red dot optic. FN America serrates the slide over a black polymer frame, and iron sights support reliable aiming with or without a mounted optic. This configuration ships without a manual safety, relying on the double-action-only trigger, and includes two magazines. Among optics-ready semi-auto handguns, this 509C MRD configuration favors concealed carry with red dot compatibility.

Key Specifications

• The chambering is 9mm.
• The capacity is 15 rounds.
• The barrel measures 3.7 inches, finished in black.
• The trigger action is double action only.
• The slide is optic ready and serrated, cut for a mini red dot.
• The sights are iron sights.
• Two magazines are included.
• Shipping weight of approximately 3.3 pounds.
• Equipped with a No safety.

Frequently Asked Questions

Is this pistol cut for a red dot optic? Yes, the slide is optic ready for a mini red dot (MRD).

What trigger action does this pistol use? A double-action-only trigger.

Buy the FN 509C MRD Pistol, 9mm

Compact, optics-ready carry performance in a double-action-only trigger is exactly what this 509C MRD delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.