Hybrid Rifle-length AR15 Barrel

Criterion's rifle-length AR-15 Hybrid barrel contour is a mid-weight government contour aimed at improving the performance over traditional government contours. Introduced in 1999, its proven design produces consistent harmonics and improves precision while remaining balanced for use in the field.

Why Hybrid?

• Added chamber material - absorbs heat even during hard use and increases rigidity
• Mid-weight design - reliably handles high heat while maintaining exceptional performance
• .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 without degrading accuracy
• 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 or unsuppressed use
• .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.