Proof Research 100448 AR-Style Barrel 223 Wylde 18" Rifle Length Gas System 1:8" Twist 4 Grooves, 1/2-28 tpi, Carbon Fiber Wrapped
Up to 64% lighter than traditional steel barrels of similar contour. Improved heat dissipation for cooler and longer lasting barrels. Wrapped with high-strength, aerospace-grade carbon fiber impregnated with a proprietary matrix resin.