A device for creating a plication within a hollow organ. The device includes an elongated member having distal and proximal ends. The device has an end effector attached to the distal end of the elongated member. The end effector has a substantially hollow housing, a fixed jaw extending distally from the housing, and a retractable jaw located within the housing. The jaw is slidable distally such that the retractable jaw can juxtapose the fixed jaw.