Magpul has an AR armorer’s wrench and a barrel extension vise (BEV) block. The Wrench is investment casted with a phosphate coating. It has all the tools necessary to build an AR upper and even has modifications to install a castle nut with an ASAP. The wrench retails for $79.95.
The BEV Block is Magpul’s version of a vise block.The BEV Block retails for $49.95.