Proof Research

Color: Black - Material: 416R Stainless Steel/Carbon Fiber - Length: 20 Inches - Caliber: 6.5 Grendel - Twist: 1:8 - Threads: 5/8-24 - Chrome Lined: No - Gas Block Diameter: 0.875 Inches - M4 Feed Ramps: Yes - 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