Griffin 17.1″ 4150 CMV Chrome-Lined 223 Wylde HEDP Barrel

Griffin HEDP™ Chrome-Lined Barrels provide High Endurance Dual Purpose functionality — offering high durability and precision accuracy. Chrome-lined 4140 CMV steel delivers military-spec toughness and unmatched bore protection, providing the highest possible hardness and longest throat life available with match grade bore dimensions and bore finish. HEDP barrel bores are hand lapped, ensuring batch-to-batch consistency and accuracy. TRUE-BORE™ concentric suppressor grade threads provide an optimized thread interface for your silencer regardless of brand or model. M4 feed ramps and chambers are polished prior to chrome lining for smooth, reliable feeding, chambering, and extraction. Gas ports were carefully engineered to provide reliable function suppressed or unsuppressed with 5.56 NATO ammunition. M4A1 contour diameter between the chamber and gas block for minimal POI shift with suppressors and maximum accuracy and durability while maintaining field weight. 5R rifling is believed by many to be superior to conventional rifling, reducing bullet deformation, and barrel fouling, affording more consistent accuracy, reduction of wear (greater life), and greater ease of cleaning. 5R rifling was used in the legendary Army M24 Sniper Weapon System (SWS) and those rifles were found to meet or exceed accuracy requirements at over 20,000 rounds fired. The Gas Block (if added) can be pinned by a trained gunsmith. Barrel weight is 33.5 oz. Gas Block, if desired, can be added on for an additional fee. Features Chrome-Lined 4140 Chrome-Moly-Vanadium Steel Black Phosphate Exterior Finish Magnetic particle inspected Button rifled 5R rifling offering less constriction on the bullet 223 Wylde chamber for optimal accuracy Rifle length gas for softer recoil characteristics .750″ gas block journal M4A1 diameter for reduced POI shift / Increased Accuracy & Durability Air gauged and hand lapped bore Polished chamber and M4 feed ramps TRU-BORE™ suppressor quality threads Suppressor optimized gas ports .625″ , 1/2×28 industry standard threads 33.5 oz weight 1/8 Twist