FN 509 Tactical 9mm Full-Size — PMM Barrel & Dual-Port Comp, PMM Magwell, Apex Flat Trigger, Optics-Cut Slide, Suppressor-Height Sights, Two-Tone, 3x 24-Round Mags
This FN 509 Tactical full-size 9mm is outfitted with Parker Mountain Machine upgrades, including a PMM threaded barrel paired with a PMM dual-port compensator and a PMM flared magwell. It also features an Apex Tactical flat-faced trigger. The pistol has a two-tone look with a black slide over a gray polymer frame, an optics-cut slide with FN LPOMS mounting plates and hardware included, and three factory 24-round steel magazines.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: This pistol is in overall good shape with minor scratches and blemishes from prior handling and use. The original optic cover plate is not included.
What's Included
- FN-branded soft pistol case
- FN 509 owner's manual
- FN LPOMS optics-mounting plates and hardware
- Spare interchangeable backstrap
- Apex Tactical Heavy Duty Striker (package; not installed)
- PMM dual-port compensator (installed)
- PMM flared magazine well (installed)
- PMM barrel (installed)
- Flat-faced trigger (installed)
- 3x 24-round FN factory extended steel magazines
The 509 Tactical platform here is the full-size variant, striker-fired in 9mm Luger, with a black slide over a gray polymer frame. It retains factory suppressor-height iron sights, front and rear slide serrations, and ambidextrous slide-stop levers. The dustcover integrates a Picatinny/MIL-STD-1913 accessory rail, and the frame uses FN's interchangeable backstrap system.
The slide is optics-cut and is supplied with FN's LPOMS optics-mounting plates and hardware, allowing the end user to mount compatible pistol optics using the provided plate system.
Parker Mountain Machine components highlight this build: a PMM threaded barrel mated to a PMM dual-port compensator and a PMM flared magazine well are installed. These upgrades enhance the pistol's configured feature set while maintaining a cohesive look.
The fire-control setup includes an Apex Tactical flat-faced trigger installed. An Apex Tactical Heavy Duty Striker is included in its package but is not installed, giving the buyer an additional part option.
Capacity is 24+1 with the included factory extended magazines. Three FN 24-round steel magazines are provided, and the user-stated barrel length is 4.32 inches.