When superior rigidity and heat absorption are needed, the Criterion Barrels HBAR contour is an excellent solution. The HBAR barrel provides superior harmonics under rapid strings of fire. These barrels are optimized for competition use; however, they are also a reliable option for small-game hunting. Headspace (the bolt to barrel fitment), 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. FeaturesHoned and hand-lapped rifling for bore uniformity and a pristine internal finish - aids in barrel cleaning and paramount for accuracyFinely polished chambers for reliable extraction and feedingGas hole tuned for proper function with and without suppressor750" Gas Block journal, dimpled for ease of installation and solid lock-up