Helix 6 Precision Pre-fit Threaded Rifle Barrel .300 26in Ruger Winchester Magnum Black. These Rifle Barrels from the innovators at Helix 6 Precision feature increased thermal dissipation which cools your firearm off faster and more efficiently for quicker follow up rounds. With harmonic dampening a Helix 6 Precision Pre-Fit Threaded Barrel offers better accuracy than ever before. Live up to the highest demands with the highly capable Helix 6 Precision Pre-Fit Threaded Rifle Barrel. Specifications for Helix 6 Precision Pre-Fit Threaded Rifle Barrel for Ruger: Manufacturer: Helix 6 Precision Color: Black Threads per Inch: 5/8x24 Gun Make: Ruger Gun Type: Rifle Condition: New Features of Helix 6 Precision Pre-Fit Threaded Rifle Barrel for Ruger: Increased Accuracy: Exceptional accuracy from Helix 6 Precisions proprietary carbon wrap process; Thermal Dissipation: Increased thermal cooling due to high carbon/low resin ratio; Lightweight: 50percent lighter than a steel barrel of equal contour; Harmonic Dampening: Unique carbon layup design dampens barrel harmonics for better accuracy; Stainless 416R Rifled Cores: Proven to provide the most uniform bore for match grade accuracy; Hand Lapped Bore: To reduce fowling and increase accuracy 308 Win Package Contents: Helix 6 Precision Pre-Fit Threaded Rifle Barrel for Ruger Helix 6 Precision RPR-300WM-26BL: Precision Pre-fit Threaded Rifle Barrel .300 26in Ruger Winchester Magnum Black