Ballistic Advantage 9MM Modern Series 5.5" EPC Straight Barrel (1/2x28)

Ballistic Advantage 9MM Modern Series 5.5″ EPC Straight Barrel (1/2-28)

The Ballistic Advantage 9MM Modern Series 5.5″ EPC Straight Barrel is built for compact performance and precision, making it an excellent choice for AR9 pistol builds. Whether you’re assembling a PCC (Pistol Caliber Carbine) or a dedicated 9mm AR pistol, this barrel delivers outstanding durability and smooth feeding.

Expertly machined from 4150 Chrome Moly Vanadium (CMV) steel and finished with a QPQ Nitride coating, this barrel offers superior corrosion resistance and long-lasting performance. Modern Series barrels also feature QPQ Nitride finished M4 feed ramp extensions to enhance feeding reliability. Unlike traditional AR barrels, this model is configured for a blowback gas system, eliminating the need for a gas block or gas tube.

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Key Features & Compatibility:

• Caliber: 9mm – Optimized for PCCs and AR9 pistol builds.
• Designed for: Both Colt/RR and Glock-style AR builds.
• Upper Compatibility: Works with standard mil-spec AR uppers and dedicated 9mm upper receivers.
• Lower Receiver Requirements:
  • Requires a unique magwell conversion (Colt/Rock River style) when using UZI magazines.
  • Works with dedicated 9mm lowers for Glock® magazines.
• Blowback Operation: Functions without a gas block or gas tube, simplifying the build process.
• Threaded 1/2×28 x .400 Full Profile Threads: Provides better suppressor compatibility compared to 1/2×36.
• Integrated Feed Ramp & Barrel Extension: Ensures smooth feeding and chambering.
• True Barrel Length: The stated barrel length includes the integral barrel extension.
• Enhanced Feed Ramp: Improves reliability with various ammunition types.

Important Notes:

• A standard 1/2×28 flash hider will not have enough clearance for a 9mm round to pass.
• Before installing a muzzle device, always check clearance by ensuring a 9mm round drops freely through the bore.

Legal Considerations:

You may use this barrel with a lower receiver that is a Registered SBR, Machine Gun, or Pistol. Possession of this barrel along with a Non-NFA lower receiver is prohibited, except when installed on a pistol configuration firearm.