The ar-pivot mount aligns the Burris ar-tripler perfectly behind the xts-135 speed dot. If you find yourself in a close quarters shooting situation you can flip the Tripler out of the way at the push of a button. When you want to re-engage the Tripler all you have to do it flip it back to its up upright position and it will lock into place exactly where it needs to be. The Pivot mount also features a quick detach lever for split second mounting and removal..