A deployment system for a prosthesis to be deployed into an internal lumen of a patient, the deployment system comprising: an introducer having a prosthesis retention region at a distal end of the introducer; and a prosthesis retained along the prosthesis retention region, the introducer comprising an axial spacing mechanism disposed axially along at least a portion of the prosthesis retention region, the axial spacing mechanism comprising a longitudinal member extending between a first stent contact point (130,- 176) and a second stent contact point (132, 178), the two contact points extending radially from the prosthesis retention region at different axial locations, the prosthesis comprising a tubular graft body, having a first graft end and a second graft end and a lumen therethrough, a first stent and a second stent coupled to the graft body, the first stent coupled to the graft proximate the first graft end, wherein the first stent is the most proximal stent, and the second stent coupled to the graft proximate to the second graft end, wherein the second stent is the most distal stent, each stent having a proximal end and a distal end, the first and second stents being spaced from one another by an axial distance between the distal end of the first stent and the proximal end of the second stent, wherein when the prosthesis is mounted on the prosthesis retention region in a radially compressed configuration, the distal end of the first stent is engageable with the first stent contact point (130, 176), the proximal end of the second stent is engageable with the second stent contact point (132, 178), and the axial spacing mechanism maintains the axial distance between the first and second stents at a substantially fixed distance. an introducer having a prosthesis retention region at a distal end of the introducer; and a prosthesis retained along the prosthesis retention region, the introducer comprising an axial spacing mechanism disposed axially along at least a portion of the prosthesis retention region, the axial spacing mechanism comprising a longitudinal member extending between a first stent contact point (130,- 176) and a second stent contact point (132, 178), the two contact points extending radially from the prosthesis retention region at different axial locations, the prosthesis comprising a tubular graft body, having a first graft end and a second graft end and a lumen therethrough, a first stent and a second stent coupled to the graft body, the first stent coupled to the graft proximate the first graft end, wherein the first stent is the most proximal stent, and the second stent coupled to the graft proximate to the second graft end, wherein the second stent is the most distal stent, each stent having a proximal end and a distal end, the first and second stents being spaced from one another by an axial distance between the distal end of the first stent and the proximal end of the second stent, wherein when the prosthesis is mounted on the prosthesis retention region in a radially compressed configuration, the distal end of the first stent is engageable with the first stent contact point (130, 176), the proximal end of the second stent is engageable with the second stent contact point (132, 178), and the axial spacing mechanism maintains the axial distance between the first and second stents at a substantially fixed distance.