Apex Tactical FN 509 4″ Drop-in Threaded Barrel


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This is the perfect upgrade for your FN 509 pistol—make it suppressor ready! The Apex Threaded Barrels are manufactured from premium quality stainless steel barrel blanks utilizing their proprietary in-house broaching process. The Apex FN 509 threaded barrel features a 1:10” twist rate and a 1/2-28 thread pattern. Barrels are heat treated and black Melonite finished. A thread protector with a captive O-Ring is included with each barrel.

Features :

  • Precise Manufacturing
  • Long Term Reliability
  • Durable Construction
  • No fitting required

For Use In These Guns

Part #105-072 is for use in all FN 509 9mm pistols with a factory 4.0″ non-threaded barrel and Tactical models.

Part #105-074 is for use in the FN 509 LS Edge 9mm pistols with a factory 5.0″ non-threaded barrel.

Part #105-075 is for use in the FN 509 Compact 9mm pistols with a factory 3.7″ non-threaded barrel.

What’s Included

  • Apex Threaded Barrel
  • Thread Protector w/ O-Ring (installed)

Not for sale to the following locations: CA, CT, HI, NJ, NY, DC & City of Aurora, IL

Map of the United States that Restrict Threaded Barrels
Barrel Length









Apex Tactical Specialties

Apex Tactical Specialties is the leading manufacturer of drop-in aftermarket parts, designing and manufacturing more triggers and kits for more makes and models of pistols, including revolvers, than any other company. Founded in 2001, Apex got its start and built its reputation with innovative, cutting edge gunsmithing. Founder Randy Lee’s brilliant revolver work made Apex the ‘go to’ gunsmithing house in the country among wheelgun competitors serious about the quality and performance of their competition revolvers. In 2009 Apex ventured beyond the confines of traditional gunsmithing with the introduction of their Fully Machined Sear – Apex’s first drop-in aftermarket part for the M&P pistol line. Since then, Apex has maintained a tightly focused quality-driven approach to the design and development of products that address the needs of its customers. Apex’s reputation for manufacturing the best pistol performance upgrades in the industry has grown to the point that many of the major firearms manufactures now work with Apex in some degree or another. And now, when a new handgun is introduced, one of the first questions anybody asks is “does Apex make a trigger for it?” Today, Apex remains true to its original mission of designing and producing superior parts, providing exceptional performance and craftsmanship, and above all, delivering unparalleled customer service...because we can. Apex Tactical is a Licensed Firearms Manufacturer in compliance with all necessary regulations. Type 7 FFL ITAR Registered CAGE Code: 9D646
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Apex Tactical FN 509 4″ Drop-in Threaded Barrel

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