This adapter is designed to slide on to the front of the spring powered airsoft shotty replicas like the ones made by UTG, Bravo and DE (Double Eagle). It requires no tools or additional parts to attach. Simply unscrew the cap on the magazine tube on the front of the gun, slide on the adapter and then add that cap back to lock the adapter down. The adapter adds two rails to the front of the gun, the rail on the left is canted 25 degrees to clear the pump and is perfect for adding a stationary light like the WML or a TLR. The right side has a flat 90 degree 2 slot rail piece great for adding cameras or a fixed flashlight that can be controlled via a remote switch. The adapter is not compatible with Tokyo Marui.