Single-rail gas block fits standard bull barrels and measures .936" in diameter. Gas block includes a three-slot Picatinny rail and mounting hardware.
Specifications and Features:
Gas block replaces existing front sight tower and allows the use of rail mounted accessories such as detachable or flip up front sights.
High quality aluminum with mil-spec hardcoat anodized finish.
For any barrel with a gas block journal diameter of .936".