FN 509 Compact MRD Comp 9mm 4.2" FDE 10+1 66-101795

FN 509 Compact MRD Comp

The FN 509 Compact MRD Comp delivers full-size performance in a compact, concealable package chambered in 9mm. It features a 4.2 inch cold hammer-forged barrel with an auto-indexing compensator that reduces muzzle flip by approximately 25 percent, paired with FN's patented Low-Profile Optics Mounting System for direct mounting of more than 10 miniature red dot optics. Finished in Flat Dark Earth and weighing 25.5 ounces with an overall length of 7.5 inches, this striker-fired pistol ships with two 10-round magazines and all-black co-witness iron sights.

The slide incorporates aggressive serrations, an external extractor, and a loaded chamber indicator for positive manipulation and status checks. Fully ambidextrous controls include the slide stop and magazine release, while the shortened polymer grip offers enhanced texture and interchangeable backstraps for improved recoil management and a customized fit. A MIL-STD-1913 accessory rail supports lights or lasers, and the polished chamber and feed ramp promote reliable feeding across compatible FN 509 magazines.

This pistol is well suited for concealed carry, defensive use, and range training where reduced muzzle rise, optics readiness, and compact dimensions are priorities. The combination of a compensated barrel, optics-ready slide, ambidextrous controls, and durable construction makes the 509 Compact MRD Comp a versatile choice for shooters seeking proven FN reliability in a modern carry platform.

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