Fluted AR15 Barrel

Criterion’s fluted AR15 barrels feature eight crisp, straight flutes that aid in rapid cooling and weight reduction while maintaining rigidity. The straight flute design was chosen to maximize harmonic consistency and accuracy potential, making this barrel an excellent option for your next match rifle, or for boosting they aesthetics of your next build.

Why Fluted?

• Flutes - aids in rapid cooling and weight reduction while maintaining rigidity
• .223 Wylde chamber - safely and reliably fires both .223 Remington and 5.56 NATO with improved accuracy due to more consistent chamber pressures
• Stainless Steel - improved barrel break-in
• Honed - refines bore for superior uniformity to reduce bullet deformation
• Hand-lapped - essential for accuracy and to minimize fouling
• Polished chamber - reliable extraction and feeding
• Rifle gas system - optimized gas port for suppressed and unsuppressed use
• 0.750” gas block journal - easy and secure installation
• 1/2x28 muzzle threads - compatible with most muzzle devices and suppressors
• Precision-machined barrel extension - safe and reliable feeding

Why Headspace Matters

Purchasing a headspaced bolt is not required. However, Criterion's headspace service guarantees optimal bolt to barrel fitment using premeasured bolts and certified headspace gauges, helping to maximize the performance and function of your build.

Headspace (the critical measurement from the bolt face to the shoulder of the chamber), must be checked for optimal performance and reliability. Proper headspace produces consistent chamber pressures and seating depths which results in increased accuracy and reliability, while reducing wear and tear on internal parts and components.