5” Direct Drop-in Ported Barrel for FN 509 for Pistols with the Apex Ported Slide

This Apex ported barrel is designed for use in Apex slides for the FN 509 with port vents matching the barrel ports when the barrel is in battery.

Barrel Features

• Manufactured from a Cold Hammer Forged Blank of Heat-Treated Stainless Steel  
• 1:10 Twist Rate
• Recessed Target Crown
• 5 Port design to reduce muzzle rise (These ports align with the ports on the latest Apex 5” 509 slides)
• Black Melonite Finished
• 100% Manufactured in the USA, right here in Phoenix

Ported Barrel Considerations

This is a ported barrel, meaning that the pressure vessel has holes strategically placed along the bore to vent the high pressure, hot gas at just the right time; reducing muzzle rise and felt recoil for the user.

The host slide MUST have port vents that align with the barrel ports or the hot gasses coming off the barrel ports will explosively de-construct (explode) your pistol frame in your hand.

Cautions:

• Always wear safety glasses while handling firearms.
• DO NOT USE A PORTED BARREL IN A NON-PORTED SLIDE.
• ALWAYS CHECK THE SLIDE AND BARREL PORT CLEARANCE BEFORE USE.
• FAILURE TO OBSERVE THIS WARNING WILL RESULT IN BODILY HARM AND FIREARM DAMAGE.
• The entirety of the barrel ports must align with the slide windows so the complete perimeter of the barrel port is visible through the windows of the slide when the barrel is installed.
• Hot gases and debris emit from the barrel ports upon firing; hot gases may cause property damage, clothing damage, or severe injury to the user or bystanders; keep body parts, clothing, and equipment away from ports while firing.
• DO NOT USE PLATED OR RAW LEAD AMMUNITION WITH A PORTED BARREL
• Users should expect a projectile velocity reduction of up to 5% with a ported barrel, compared to a non-ported barrel; this may affect bullet deformation and expansion at termination.
• Visible muzzle flash is often increased with the use of a ported barrel and may affect the user’s vision in the dark.
• Ported barrels are loud; always use proper hearing protection and be mindful of your surroundings.