Apex Announces Threaded Barrel for 3.7″ FN 509 Compact MRD

Apex Tactical Specialties is expanding its pistol barrel lineup with the addition of a new threaded barrel for the FN 509 Compact MRD model pistols. This new offering comes just days after Apex announced their new threaded barrel for the compact M&P9 M2.0. The new barrel is available now for pre-order and is slated to officially begin shipping on May 5th.

The Apex 9mm Threaded Barrel is designed specifically for the FN 509 Compact MRD model pistols with a factory 3.70″ barrel. The cold hammer-forged stainless steel barrel has a black Melonite finish and features a 1:10″ twist rate that is designed for optimal accuracy performance. The barrel features an undercut thread intercept to accommodate a wide variety of attachments and the thread pattern is 1/2-28. A thread protector with captive O-ring is included.  

This barrel is a true drop-in and requires no fitting.

Features and Specifications:

  • For 9mm FN 509 Compact MRD pistols
  • Replaces 3.70″ factory barrel
  • Cold hammer-forged stainless steel
  • Black Melonite finish
  • 1:10″ Twist Rate
  • 1/2–28 Thread pattern
  • Thread protector included
  • Accommodates a wide variety of attachments
  • No fitting required
  • Apex Part #: 105-075
  • MSRP: $199.95

The Apex Threaded Barrel for the FN 509 Compact MRD can be pre-ordered at ApexTactical.com. In addition to the new barrel Apex offers a variety of upgrades compatible with the new FN 509 Compact MRD, including action upgrade kits, heavy duty strikers and extractors, and slide maintenance kits.


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