Yankee Hill AR-15 Single Rail Gas Block YHM-9386A .625" Diameter
This gas block replaces your existing front sight and allows the use of dovetail mounted accessories. Installs easily with two cap screws onto barrels of .625" diameter under the front sight. Made from high quality steel and finished with a Mil. Spec. phosphate coating.
*Receive a free SAA complete upper parts kit (forward assist assembly & dust cover assembly) with standard charging handle when you purchase this item!