Rock River Arms is a premium manufacturer of AR and AR-related accessories. This particular Rock River Arms gas block assembly is a flip front sight, clamp on gas block assembly. It features three sling swivels for multiple carry configurations and a Picatinny rail in the bayonet lug position for an additional attachment point.

Features and Specifications:
Rock River Arms Gas Block Assembly
Flip Front Sight
Clamp-On Style Attachment
Sling Swivels
Picatinny Rail Bayonet Lug
Material: Aluminum
Finish: Matte Black