Home / Pistols / FN
▼ 17% off
FN 509 Midsize Tactical 9mm 4.5 Barrel 24-Rounds MRD Ready

FN 509 Midsize Tactical 9mm Luger 4.5" Threaded Pistol MRD Ready

Best price
17% off MSRP 76 in stock at 89 retailers
1/2 x 28 threaded muzzle with cap"
15-round and 24-round magazines
2 Magazines
Duty-safe trigger with 5.6-lb. pull
FN Low-Profile Optics-Mounting System
Fully ambidextrous controls
High visibility, low-friction magazine follower, polymer base with black finish
Interchangeable backstraps

Specifications

Caliber
Brand
Model
Series
Midsize Tactical
MPN
66-100837
UPC
845737015169
MSRP
$949.00
Action
Striker Fired
Barrel Length
4.5"
Capacity
15 Rounds

Description

The FN 509 Midsize Tactical is a striker-fired 9mm Luger pistol designed for concealed carry, home defense and duty use. This MRD version uses the FN Low Profile Optics Mounting System, which allows direct mounting of more than 10 miniature red dot optics.

The pistol has a 4.5-inch threaded barrel and slide, a midsize frame and a standard 15-round capacity. It has a polymer frame with a black PVD finish, suppressor sights, ambidextrous controls and a trigger that breaks at about 5 pounds. Two interchangeable backstraps are included, and the pistol has no manual safety.

The package includes two magazines and is compatible with larger-capacity FN 509 magazines when used with a sleeve, including a 24-round option.

  • Caliber: 9mm Luger
  • Barrel Length: 4.5 inches
  • Threaded Barrel: Yes
  • Capacity: 15 rounds (24-round magazine compatible with sleeve)
  • Frame Material: Polymer
  • Finish: Black PVD
  • Optics Ready: Yes (MRD, Low Profile Optics Mounting System)
  • Magazines Included: 2

Other Handguns

Stay Connected

Join our newsletter for the latest updates and exclusive deals.

ARMSAGORA

Compare prices on firearms, ammunition, and accessories from hundreds of trusted retailers. Find the best deals, track prices, and build your own loadouts.

© 2026 ARMSAGORA. All rights reserved.
Not an FFL licensed dealer. ARMSAGORA is a free product comparison tool. Some links to retailers are affiliate links: we may earn a commission when you buy, at no extra cost to you.