The removal and installation of barrels, flash hiders, gas blocks and hand guards is made much easier and simpler. The Reaction Rod is designed to be gripped in a bench vise so that the rod is either horizontal or vertical. The upper receiver is then slid onto the rod and the rod’s integral splines enter the barrel extension and secure the barrel extension from turning. This allows all the torque from barrel nut wrenches to go directly into the barrel extension. In contrast, receiver vise blocks transmit the turning force into the aluminum receiver, a good part of which passes through the small, easily distorted receiver index pin. With the Geissele Reaction Rod, marring of an upper receiver’s finish by gripping and twisting inside vise blocks is eliminated and so is the need to remove sights and mounts from the receiver’s M1913 rail.
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Only way to goReview by Marine Distinguished
I searched many items used to support the upper receivers in order to attach and torque a barrel or muzzle break. I've never been satisfied with the other block, etc. because they could damage the UR. I called a prominent company that builds their own AR-15/10's and asked them what they used. Their answer was "Geissele Reaction Rods." I ordered one for my son's AR-10. The barrel had not been torqued down correctly. When I got the rod I immediately put it to work in my vise and removed the muzzle break. Then I pulled the barrel out slightly and turned it upside down to loosed the gas plug. Back 180 degrees and I removed the barrel nut and with the right number of shims, torqued the barrel down to spec. At no time was there any pressure on the UR. The scope was still attached to the UR and was not an interference. For a one piece of quality metal this is the only way to go to work on the UR and barrel, etc. I just ordered one for my AR-15's. This rod gives you piece of mind. No fear of damaging the UR and easy to use.