First look at the Otis Technology PRO+ AR-15 Lock Block; designed to make the removal and installation of barrels, hand guards, gas blocks, and muzzle devices quicker and easier. If you’ve ever tackled a barrel or flash hider fixed with LokTite you know the extreme torque required to remove them. Clamp this into a standard bench vise; the AR-15 Lock Block locks into the barrel extension, securing it from twisting and minimizing the chance of marring. The torque is applied