The clamp-on RRA .750" diameter gas block is a premium upgrade for AR-15s. Rock River Arms' AR-15 gas block sight base is made of weight-saving aluminum and features a receiver-height Picatinny rail that is perfect for your fold-down or removable front sight. Choose your upgrades from a company with a well-established reputation that professional and serious shooters trust.
Features and Specifications:
Rock River Arms AR-15 Gas Block
Receiver-Height Picatinny Rail
Clamp-On Style Attachment
Finish: Matte Black
Fits: Barrels with .750 diameter gas journals