Ultimate Arms Gear .223 5.56 AR15 AR-15 M4 M16 Rifle Lower Receiver Mag Magazine Red Injected Polymer Gunsmith Vise Block
Constructed of red injection molded polymer.Easy to use, the block allows the user to work on and install parts to AR-15 / M16 lower receivers. The vise block is locked into the users table/workbench vise. The block slips into the rifle's magazine well and is held in place by the rifle's magazine catch.