Veteran owned and operated New Frontier Armory has been making a name for itself since its inception in 2009 by manufacturing high quality AR and PCC parts and accessories. Palmetto State Armory is proud to begin carrying a line of the New Frontier Armory products including the Universal Upper Receiver Vise Block. Universal Upper Receiver Vise block for all standard sized upper receivers made of rugged grey PVC material. Machined to fit ALL versions of New Frontier G-15, C-4, C-5, and Pistol Caliber Upper Receivers including side chargers and uppers utilizing the LRBHO system without removing any parts. Includes two quick pins to secure upper to vise block.