Barrel Nut Wrench for AR15/M16 Rifles allows the shooter to put the exact amount of pressure needed on the barrel nut while attaching barrel to the receiver.
Constructed of 3/8" steel with 5 steel tightening pins, can use a 3/8 or a 1/2 driven torque wrench. The wrench is designed for a 20 hole pattern barrel nut on a Radius of .78"
Knights Armament (KAC)
Criterion