Proof Research AR Barrels Features The Proof Research Carbon Fiber Barrel is built using match grade carbon fiber wrapped construction that Proof Research states can be up to 64 percent lighter than a comparable steel barrel while maintaining the same match grade accuracy. This dramatic weight reduction matters most on a build where balance and handling speed count letting shooters carry and maneuver the rifle with less fatigue over a long day. Improved heat dissipation keeps the barrel cooler during strings of rapid fire helping maintain accuracy and reduce point of impact shift that plagues steel barrels during high volume shooting. Reduced harmonic vibration further contributes to the barrel s consistent accuracy from shot to shot. Chambered in 6mm ARC with a 1 in 7.5 inch twist rate this barrel is well suited to stabilizing the heavier for caliber bullets that make 6mm ARC effective at extended ranges. At 14.5 inches the intermediate length gas system strikes a practical balance between a shorter carbine s handling and a longer rifle s velocity and reach. The 5/8x24 threaded muzzle gives builders flexibility to add a suppressor brake or flash hider as their build requires. For AR-15 builders chasing precision performance without the weight penalty of steel the Proof Research Carbon Fiber Barrel is a proven option for sale at GrabAGun. Proof Research AR Barrels Specifications Manufacturer: Proof Research Model: Barrel Caliber: 6mm ARC Barrel Length: 14.5 Barrel Material: Carbon Fiber Barrel Description: Carbon Fiber Wrapped Barrel Type: Intermediate Length Twist: 1:7.5 Thread Pattern: 5/8x24 Compatible Hosts: AR-15 Weight: 1.5 lbs Available At: GrabAGun