Helix 6 B264801200265 Carbon Fiber Barrel Blank 26" Black Finish 416R Stainless Steel Material With .264" Diameter, Button Rifling & 1:8" Twist For Rifles Helix 6 Precision's Carbon Fiber Barrel Blank Ready To Be Fit To Your Rifle By Your Gunsmith Professional. These Barrels Feature Hand Lapped Button Rifled 416R Stainless Steel cores. Wrapped In Carbon Fiber using Our Proprietary Process. Capable Of Your highest Demand In Accuracy And Performance. Length: 26" Model: Carbon Fiber Twist: 1:8" Sights: None Finish: Carbon Fiber Barrel Type: Button Rifled Barrel Features: Carbon Fiber Wrapped