An delivery device including an inner tube having an inner tube proximal end region and an inner tube distal end region, the inner tube distal end region comprising a first retaining mechanism a middle tube having a middle tube distal end region and a middle tube proximal end region and defining a middle tube lumen, the inner tube disposed within the middle tube lumen and an outer tube having an outer tube proximal end region and an outer tube distal end region and defining an outer tube lumen, the middle tube disposed within the outer tube lumen, the outer tube distal end region comprising a second retaining mechanism wherein the inner tube is structured and arranged to displace proximally and distally relative to the middle tube, and wherein the outer tube is structured and arranged to displace proximally and distally relative to the middle tube. A method of deploying an endoprosthesis is also disclosed.
