A detachment system for delivering an implantable medical device to a target location of a body vessel, comprising: a generally hollow distal tube comprising: a proximal end; a distal end; a compressible portion of the distal tube itself, between the proximal and distal ends (302, 304) which is axially movable from a compressed condition to an elongated condition; and a flexible portion of the distal tube itself, between the proximal end and the compressible portion; the detachment system further comprising: a generally hollow proximal tube having a proximal end, a distal end, and a flexible portion of the proximal tube itself, between the proximal and distal ends (102, 104); and an engagement system (140, 400) configured to engage and deploy the implantable medical device positioned at the distal end of the distal tube; wherein the engagement system (140, 400) is configured to maintain the compressible portion in the compressed condition when engaging the implantable medical device, and wherein the engagement system (140, 400) is configured to deploy the implantable medical device and release the compressible portion to the elongated condition; the detachment system further comprising: a coupling disposed between the proximal end of the distal tube and the distal end of the proximal tube, joining the proximal and distal tubes (100, 300); characterized in that: the proximal tube partially overlaps the coupling, the distal tube partially overlaps the coupling, and a gap which is formed on the coupling between the proximal tube and the distal tube comprises a weld band to weld the coupling to the proximal tube and the distal tube. a proximal end; a distal end; a compressible portion of the distal tube itself, between the proximal and distal ends (302, 304) which is axially movable from a compressed condition to an elongated condition; and a flexible portion of the distal tube itself, between the proximal end and the compressible portion; a generally hollow proximal tube having a proximal end, a distal end, and a flexible portion of the proximal tube itself, between the proximal and distal ends (102, 104); and an engagement system (140, 400) configured to engage and deploy the implantable medical device positioned at the distal end of the distal tube; wherein the engagement system (140, 400) is configured to maintain the compressible portion in the compressed condition when engaging the implantable medical device, and wherein the engagement system (140, 400) is configured to deploy the implantable medical device and release the compressible portion to the elongated condition; a coupling disposed between the proximal end of the distal tube and the distal end of the proximal tube, joining the proximal and distal tubes (100, 300); characterized in that: the proximal tube partially overlaps the coupling, the distal tube partially overlaps the coupling, and a gap which is formed on the coupling between the proximal tube and the distal tube comprises a weld band to weld the coupling to the proximal tube and the distal tube. the proximal tube partially overlaps the coupling, the distal tube partially overlaps the coupling, and a gap which is formed on the coupling between the proximal tube and the distal tube comprises a weld band to weld the coupling to the proximal tube and the distal tube.