Various clips for mounting accessories to rails, tracks and/or other mounts are described. In some examples, a clip may include a first part and a second part configured to at least partially cooperate with the first part to apply pressure to opposite sides of the rail, track or other mount. A tensioning mechanism may be configured to pull the first part and the second part together and/or to push the first part and the second part apart. A third part that may be configured to rotate with respect to the first part and/or the second part from an open position to a closed position, and to cooperate with the tensioning mechanism to pull the first part and the second part together and/or to push the first part and the second part apart. The third part may include a cam that is configured to increase a pressure applied by the first part and the second part to the rail, track or other mount when the third part is closed.