To detach, push the button and twist counter-clockwise 30 degrees.The buttstock will then be separated from the firearm.To re-attach, align the two pieces, push in and turn clockwise 30 degrees.The steel locking mechanism automatically secures the adapter.It's 7075 aluminum construction and steel internals make the rab-ad both robust and lightweight.The rab-ad is designed for gas piston, direct impingement, direct blow back and radial delayed blowback systems in the ar platform.Finish: AnodizedMaterial: Aluminum/Steel