FN 509 Compact MRD Comp NMS 9mm – FDE, 4 in Barrel, Tool-less QD Compensator, Optics-Ready, 12rd & 15rd Magazines
The FN 509 Compact MRD Comp NMS stands out with its factory quick-detach, no-tools-required compensator and FN's MRD optics-ready slide system. This compact, striker-fired 9mm pairs a uniform FDE slide and frame with tall iron sights, ambidextrous slide stop levers, and an integral accessory rail. It ships with both 12- and 15-round magazines, and the frame is marked FN Columbia, SC USA.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Minimal handling wear is present. The bore is clean with some wear visible on close inspection.
What's Included
- FN 509 Series owner's manual
- FN Low-Profile Optics-Mounting System plates and hardware (factory multi-pocket bag)
- FN factory box with matching label (FN 509C MRD Comp NMS)
- 1x 12-round magazine
- 1x 15-round magazine with grip sleeve (extended)
This compact MRD Comp NMS variant integrates FN's factory quick-detach, tool-less compensator that auto-indexes when installed. FN cites up to approximately 25% reduction in muzzle rise with this unit, helping the 4 in barrel configuration stay flatter during strings of fire.
The slide features forward and rear cocking serrations, an optic cut with cover plate, and FN's Low-Profile Optics-Mounting System plates and hardware included. Tall iron sights consist of a black front post and a serrated rear notch for a crisp sight picture.
Controls are practical and ambidextrous where it counts, with slide stop levers on both sides and a no-manual-safety (NMS) configuration. The striker-fired action, polymer frame, and integral accessory rail round out a carry-friendly, duty-capable setup.
Finish and build details include a uniform FDE frame and FDE slide. The frame is marked FN Columbia, SC USA and the pistol is made in the USA. Included factory FN 509 steel magazines provide versatility: a compact 12-round option and a 15-round extended magazine with a grip sleeve, with overall capacity listed at 15+1.