Clarification:
We are selling proprietary MAX-11/15 Receiver Vise Inserts. We mistakenly referred to these as Barrel Vise Inserts in the e-mail. These are plastic vise inserts to install in a vise so you can remove the barrel nut and change the barrel. They follow the contour of the MAX-11/15 upper receiver and allow a firm, non damaging grip of the upper receiver.
The barrel nut on the production run of MAX-11/15s is 30mm across the wrench flats. The Beta Units used a 32mm wrench flat. The wrench we will be selling is a 30mm crowfoot wrench that can be attached to a torque wrench to insure the barrel nut is tightened to the proper torque. Any 30mm wrench will do, but you need to torque the barrel nut when installing. A standard AR 15 armorers' wrench will not remove the barrel nut. If you just want to remove the barrel nut and install a different AR 15 barrel and barrel nut, an adjustable wrench will remove it. You might mar the barrel nut though.
If you plan on shooting the MAX-11/15 in the original configuration, and do not wear out the barrel, you will not need these tools.
The wrench is $20.00 and the Vise Inserts are $30.00 for the set (right and left sides).