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.

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