A self-expanding medical device delivery system comprising: a delivery sheath with a lumen and a proximal portion; an inner member partially disposed within said lumen of said delivery sheath, said inner member having a lumen and a proximal portion and a distal end, said proximal portion of said inner member having a plurality of first openings and a plurality of second openings, where said second opening is disposed proximally of said first opening; a self-expanding medical device disposed about said proximal end of said inner member, said self-expanding medical device having a proximal end, said self-expanding medical device having exposed structural members on said proximal end of said self-expanding medical device; a plurality of trigger wires partially disposed within said lumen of said inner member, said plurality of trigger wires exits said lumen of said inner member through one of said plurality of first openings and re-entering said lumen of said inner member through one of said plurality of second openings such that said proximal portion of said trigger wire forms a bend, said bend of said trigger wire engaging said exposed structural members and such that said exposed structural members are compressed and said self-expanding medical device is retained by said proximal portion of said trigger wire; and said plurality of trigger wires configured to be withdrawn in the distal direction through said lumen of said inner member such that said trigger wires disengage said exposed structural members and release said self-expanding medical device, characterized in that said trigger wires have a proximal portion with a first diameter and a first distal portion with a second diameter, where said first diameter is greater than said second diameter. a delivery sheath with a lumen and a proximal portion; an inner member partially disposed within said lumen of said delivery sheath, said inner member having a lumen and a proximal portion and a distal end, said proximal portion of said inner member having a plurality of first openings and a plurality of second openings, where said second opening is disposed proximally of said first opening; a self-expanding medical device disposed about said proximal end of said inner member, said self-expanding medical device having a proximal end, said self-expanding medical device having exposed structural members on said proximal end of said self-expanding medical device; a plurality of trigger wires partially disposed within said lumen of said inner member, said plurality of trigger wires exits said lumen of said inner member through one of said plurality of first openings and re-entering said lumen of said inner member through one of said plurality of second openings such that said proximal portion of said trigger wire forms a bend, said bend of said trigger wire engaging said exposed structural members and such that said exposed structural members are compressed and said self-expanding medical device is retained by said proximal portion of said trigger wire; and said plurality of trigger wires configured to be withdrawn in the distal direction through said lumen of said inner member such that said trigger wires disengage said exposed structural members and release said self-expanding medical device, characterized in that said trigger wires have a proximal portion with a first diameter and a first distal portion with a second diameter, where said first diameter is greater than said second diameter.