Brownells BRN AR-15 Upper Receiver Vise Block Polyethylene Black

The Brownells BRN AR-15 Upper Receiver Vise Block is a specialized gunsmithing tool designed for secure workholding during AR-15 upper receiver assembly and maintenance. Constructed from durable polyethylene material that won't mar or damage receiver finishes. Features precise dimensions that replicate the lower receiver's upper interface for proper support and alignment. The block securely holds the upper receiver in a standard bench vise, allowing gunsmiths to safely install barrels, handguards, and other components. Essential for barrel nut torquing and general upper receiver work. Compatible with mil-spec AR-15 upper receivers. Black polyethylene construction provides long-lasting durability while protecting expensive receivers from vise jaw damage.