An automatic injection device, comprising: a housing comprising a proximal end and a distal end; and a syringe including a needle , a syringe body and a plunger , the syringe being moveable within the housing from a first position to a second position that is distal to the first position to move the needle toward the distal end of the housing, and the plunger being moveable relative to the syringe body to expel medication from the syringe body through the needle; characterized in that the automatic injection device further comprises: a shuttle having a distal surface comprising a protrusion and a curvilinear surface, the curvilinear surface extending from the protrusion to define an undercut region , at least a portion of the distal surface being made of a lubricant-infused material; and a follower having a follower body and a latch , the latch being moveable relative to the follower body and relative to the protrusion of the shuttle ; wherein: the follower has a coupled configuration in which the latch is biasedly coupled over the protrusion , and the follower has a decoupled configuration in which the latch has cleared the protrusion and is in sliding engagement with the curvilinear surface, the follower is rotatable relative to the shuttle , and the shuttle is moveable toward the proximal end of the housing to retract the syringe . a housing comprising a proximal end and a distal end; and a syringe including a needle , a syringe body and a plunger , the syringe being moveable within the housing from a first position to a second position that is distal to the first position to move the needle toward the distal end of the housing, and the plunger being moveable relative to the syringe body to expel medication from the syringe body through the needle; characterized in that the automatic injection device further comprises: a shuttle having a distal surface comprising a protrusion and a curvilinear surface, the curvilinear surface extending from the protrusion to define an undercut region , at least a portion of the distal surface being made of a lubricant-infused material; and a follower having a follower body and a latch , the latch being moveable relative to the follower body and relative to the protrusion of the shuttle ; wherein: the follower has a coupled configuration in which the latch is biasedly coupled over the protrusion , and the follower has a decoupled configuration in which the latch has cleared the protrusion and is in sliding engagement with the curvilinear surface, the follower is rotatable relative to the shuttle , and the shuttle is moveable toward the proximal end of the housing to retract the syringe . a shuttle having a distal surface comprising a protrusion and a curvilinear surface, the curvilinear surface extending from the protrusion to define an undercut region , at least a portion of the distal surface being made of a lubricant-infused material; and a follower having a follower body and a latch , the latch being moveable relative to the follower body and relative to the protrusion of the shuttle ; wherein: the follower has a coupled configuration in which the latch is biasedly coupled over the protrusion , and the follower has a decoupled configuration in which the latch has cleared the protrusion and is in sliding engagement with the curvilinear surface, the follower is rotatable relative to the shuttle , and the shuttle is moveable toward the proximal end of the housing to retract the syringe . the follower has a coupled configuration in which the latch is biasedly coupled over the protrusion , and the follower has a decoupled configuration in which the latch has cleared the protrusion and is in sliding engagement with the curvilinear surface, the follower is rotatable relative to the shuttle , and the shuttle is moveable toward the proximal end of the housing to retract the syringe . <EOS>