The Lug-Lok Upper Vise Block - AR15 is a precision-machined gunsmithing tool designed to securely hold any Mil-Spec AR15 upper receiver by engaging directly with the barrel lugs inside the star chamber. Constructed from non-marring, aircraft-grade aluminum, it eliminates the risk of damaging the receiver during high-torque operations. The Lug-Lok rod locks into the strongest structural point of the rifle, while the Lock Knob and dual Vise Pins ensure secure, adjustable positioning at multiple working angles. Ideal for AR15 assembly, maintenance and accessory installation, this upper vise block provides a stable, safe and repeatable hold without relying on external clamping. Precision-machined to fit all Mil-Spec AR15 upper receivers Engages directly with barrel lugs inside the star chamber for maximum strength Constructed from non-marring, aircraft-grade aluminum Eliminates risk of damaging the upper receiver during high-torque applications Lock Knob secures the rod firmly into position Dual Vise Pins allow for multiple working angles and prevent unwanted rotation Distributes torque through the steel barrel lugs, not the upper housing Ideal for AR15 building, maintenance and accessory installation Provides a stable, repeatable hold without external clamping Designed for safe, professional-grade AR15 gunsmithing and armorer work