FN 509 Threaded 4” Barrel by Apex Tactical Specialties - 9MM

What It Does

This Apex 9mm Threaded Barrel is designed specifically for the FN 509 model pistols with a factory 4.00" barrel. The heat treated stainless steel barrel has a black Melonite finish. The barrel features a 1:10” twist rate that is designed to increase accuracy performance. The thread pattern is 1/2-28 and a thread protector is included. This barrel is a true drop-in and requires no fitting.

Expected Results

• Direct replacement of factory 4.00" barrel (no fitting required)
• Improves accuracy
• Use the included Light Recoil Spring Assembly when shooting this barrel with a compensator

Applicable To What Gun(s)

• Works in all FN 509 9mm models with a factory 4.00" non-threaded barrel.

In The Package

• 1 x Apex 9mm Threaded Barrel - 4.00"
• 1 x Thread Protector w/ O-Ring (installed)
• 1 x Light Recoil Spring Assembly

Installation Resources

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