The Super Reaction Rod was designed to fulfill the need of an advanced armorer who frequently works on AR-15/M4 platforms with over torqued, seized or Loctited barrel nuts. The Super Reaction Rod works by pre-loading the barrel extension lugs to the lugs of the Super Reaction Rod to eliminate movement created by adding torque to the barrel nut while at the same time fixing the upper receiver in place. Having the barrel extension mated t...o the Super Reaction Rod lugs and fixing the upper receiver before torqueing will remove stress that could be placed on the index pin. This allows the armorer to place tremendous torque on the barrel nut to assist in breaking seized nuts loose. The Super Reaction Rod’s pre-loading system can also be removed to allow it to work just like a standard Reaction Rod, which allows upper work to be performed in a 360° both vertically, and horizontally.