A hand-held surgical instrument, comprising: a handle housing; a motor disposed within the handle housing: a shaft portion extending distally relative to the handle housing: a firing shaft received within the shaft portion and operably coupled to the motor such that an activation of the motor translates the firing shaft within the shaft portion; and a lever mechanically coupled to the firing shaft via the shaft portion, wherein the firing shaft is configured to retract in response to a manual rotation of the lever further comprising: a screw operably coupled to the motor; and a nut non-rotationally supported in the shaft portion and threadedly coupled to the screw, the firing shaft having a proximal end portion attached to the nut, wherein the nut is configured to translate the firing shaft along a longitudinal axis defined by the shaft portion in response to a rotation of the screw, characterised in that the lever is operably coupled to the shaft portion, such that a rotation of the lever rotates the shaft portion, which in turn rotates the nut about the screw to retract the firing shaft relative to the shaft portion; preferably wherein the lever has a distal end portion having a gear, and the shaft portion has a proximal end portion having a gear in meshing engagement with the gear of the lever. a handle housing; a motor disposed within the handle housing: a shaft portion extending distally relative to the handle housing: a firing shaft received within the shaft portion and operably coupled to the motor such that an activation of the motor translates the firing shaft within the shaft portion; and a lever mechanically coupled to the firing shaft via the shaft portion, wherein the firing shaft is configured to retract in response to a manual rotation of the lever further comprising: a screw operably coupled to the motor; and a nut non-rotationally supported in the shaft portion and threadedly coupled to the screw, the firing shaft having a proximal end portion attached to the nut, wherein the nut is configured to translate the firing shaft along a longitudinal axis defined by the shaft portion in response to a rotation of the screw, characterised in that the lever is operably coupled to the shaft portion, such that a rotation of the lever rotates the shaft portion, which in turn rotates the nut about the screw to retract the firing shaft relative to the shaft portion; preferably wherein the lever has a distal end portion having a gear, and the shaft portion has a proximal end portion having a gear in meshing engagement with the gear of the lever. a shaft portion extending distally relative to the handle housing: a firing shaft received within the shaft portion and operably coupled to the motor such that an activation of the motor translates the firing shaft within the shaft portion; and a lever mechanically coupled to the firing shaft via the shaft portion, wherein the firing shaft is configured to retract in response to a manual rotation of the lever further comprising: a screw operably coupled to the motor; and a nut non-rotationally supported in the shaft portion and threadedly coupled to the screw, the firing shaft having a proximal end portion attached to the nut, wherein the nut is configured to translate the firing shaft along a longitudinal axis defined by the shaft portion in response to a rotation of the screw, characterised in that the lever is operably coupled to the shaft portion, such that a rotation of the lever rotates the shaft portion, which in turn rotates the nut about the screw to retract the firing shaft relative to the shaft portion; preferably wherein the lever has a distal end portion having a gear, and the shaft portion has a proximal end portion having a gear in meshing engagement with the gear of the lever.