Geissele Automatics Reaction Rod
This video demonstrates the use of the Geissele Automatics Reaction Rod for AR-15 upper receiver work, specifically focusing on muzzle device installation. The rod locks into the barrel's star chamber, preventing torque from damaging the aluminum upper receiver. It highlights the proper installation of a muzzle device using a crush washer, emphasizing the importance of the washer's orientation and the need to smash it for a secure fit.













