Griffin Armament High Endurance Dual Purpose (HEDP) AR-15 Barrel 223 Wylde 11.5" M4 Contour 1:8" Twist Nitride

Overview

The Griffin Armament High Endurance Dual Purpose (HEDP) barrel is an 11.5-inch AR-15 barrel chambered in .223 Wylde with an M4 contour and a 1:8-inch twist rate. It is manufactured from stress-relieved 416R stainless steel and finished with a black nitride coating for increased surface hardness and durability. This barrel features button-rifled 5R rifling, which is designed to reduce bullet deformation and barrel fouling. The bore is air-gauged and hand-lapped to ensure consistency, while the chamber and M4 feed ramps are polished prior to the nitriding process for reliable feeding and extraction. The barrel includes a .750-inch gas block journal and is equipped with suppressor-optimized gas ports and concentric, suppressor-ready threads to minimize point-of-impact shift when using muzzle devices.

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