RA9-SD DEFCON4-SD K 5.75″ Ported Barrel Only (for AR9 platform)

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$300.00

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During checkout, please ensure that you select an FFL (Federal Firearms Licensee) that permits suppressor transfers (SOT). Failure to do so may result in an additional $25 processing fee for us to arrange an eligible FFL on your behalf.
Military and LEO, please contact us to claim your 5% discount.

DEFCON4-SD 5.75″ Ported K Barrel – Precision Engineering for the AR9 Platform

The DEFCON4-SD 5.75″ ported K barrel is engineered exclusively for the Ronin Arms AR9 platform, delivering exceptional suppression, accuracy, and reliability in a compact, high-performance design. Built specifically to work with Ronin Arms suppressors, this barrel ensures optimal gas flow, proper suppressor seating, and seamless function in suppressed configurations.

Important Compatibility Notice: The porting is precisely tuned for Ronin Arms suppressors and must be paired correctly. Full-size and K suppressors are not interchangeable. Using an incorrect suppressor will result in seating issues and performance failures.

Crafted from high-quality materials and precision-machined for a perfect suppressor fit, the DEFCON4-SD K barrel enhances shooting stability, gas regulation, and overall suppressed performance in a shorter, more maneuverable package.

Key Features:

5.75″ precision-machined, ported K barrel for superior suppression in a compact form
Optimized for Ronin Arms suppressors—ensuring perfect seating and gas flow
Exclusive to the AR9 system—not compatible with other platforms
Durable construction for high-round count reliability

Safety & Usage Guidelines:

  • Suppressor Required: This barrel is designed to be used with a Ronin Arms suppressor. Do not fire without a suppressor attached.
  • Correct Suppressor Pairing Required: Full-size and K suppressors are NOT interchangeable. Use only the appropriate suppressor.
  • Legal Compliance: Ensure compliance with all federal, state, and local regulations regarding suppressor use.

Upgrade your AR9 with the DEFCON4-SD 5.75″ ported K barrel—built for elite suppressed performance in a compact, maneuverable setup.

🔥 We love to see and hear what you think! Tag us in your videos and let us know how your DEFCON4-SD K barrel performs. Your feedback helps us continue pushing the boundaries of innovation!

 

 

Barrel Length

4.75"

Suppressor Length

8"

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