JE Machine Tech AR15/M16/M4 Upper Receiver Vice Block Features The JE Machine Tech AR15/M16/M4 Upper Receiver Vice Block gives builders and armorers a dedicated tool for securing the upper receiver during maintenance and assembly. Molded from heavy-duty polymer it clamps safely around the upper without marring the finish or stressing the aluminum. The block is built specifically for the AR-M16 platform so the fit is precise and the receiver stays stable during barrel installation gas block work or general cleaning. This kind of secure clamping is essential for any task that requires two free hands and a receiver that will not shift or twist. Because the block is solvent resistant it holds up to the cleaning chemicals and lubricants that are a routine part of AR maintenance without degrading over time. The matte black finish keeps the tool looking clean on a bench while resisting scuffs from repeated use. Its compact size makes it easy to store in a range bag or tool box between projects. For anyone who regularly works on AR15 M16 or M4 upper receivers the JE Machine Tech Upper Receiver Vice Block is available for sale at GrabAGun. JE Machine Tech AR15/M16/M4 Upper Receiver Vice Block Specifications Manufacturer: JE Machine Tech Model: AR15/M16/M4 Upper Receiver Vice Block Material: Polymer Color: Black Finish: Matte Compatible Hosts: AR15 M16 M4 Available At: GrabAGun