Up to 64% lighter than traditional steel barrels of similar contour - Match-grade accuracy - Improved heat dissipation for cooler and longer lasting barrels - No point-of-impact shift during high-volume fire - Reduced harmonic barrel vibration - Unprecedented durability - Color: Black - Material: 416R Stainless Steel/Carbon Fiber - Length: 18 Inches - Caliber: 223 Wylde - Twist: 1:8 - Threads: 1/2-28 - Contour: Medium - Chrome Lined: No - Gas Block Diameter: 0.75 Inches - Gas System Length: Rifle - M4 Feed Ramps: Yes