These wrenches now come with a shiny stainless looking coating. You will need a 13/16 socket, a torque wrench, and a barrel vise in addition to the Impact Action Wrench. We recommened 75 to 85 ft lbs of torque when installing a barrel onto our actions. This wrench works on all of the following models:
Impact 707R
Impact 737R
Impact SA NBK
Impact Med NBK
Impact LA NBK
Impact 777R