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