Its used to replace steel braided hose, going from the ASA to the foregrip, expansion chamber, or regulator. Remotes are basically long air hoses that screw into the ASA and allow you to place the tank in a harness on your back (so the weight isn't on the gun). Although it makes the gun lighter it is much more difficult to switch hands and play comfortably. Also there is no tank for you to shoulder, so its not really a good idea.is it used to replace a remote line or is it compatible with a remote line?