Geissele Automatics Reaction Rod Tool for AR-15 223 Remington 556NATO Steel (10-169)

• Reaction rod tool designed for 223 Remington and 5.56 NATO firearm maintenance
• Allows torque from barrel nut wrenches to transfer directly into barrel extension
• Prevents marring of upper receiver finish during installation and removal procedures
• Constructed from 4140 chrome moly steel for strength and durability
• Supports installation of barrels flash hiders gas blocks and handguards
• Designed for bench vise use securing upper receiver via internal barrel extension engagement

The Geissele Automatics Reaction Rod is an armorer tool designed for securing AR-15 upper receivers during barrel and component installation.

This armorer tool is constructed from 4140 chrome moly steel and is compatible with .223 Remington and 5.56 NATO platforms. It allows torque from barrel nut wrenches to be transferred directly into the barrel extension. The rod features integral splines that engage the barrel extension to prevent rotation during service work. This product is used for installing barrels, flash hiders, gas blocks, and handguards without applying stress to the receiver. In standard configurations, the Geissele Automatics Reaction Rod is secured in a bench vise for horizontal or vertical use. The design reduces the risk of finish marring compared to receiver vise blocks and maintains consistent alignment during gunsmithing tasks.