Endoscopic instrument

An endoscopic instrument, comprising:

• a housing;
• a shaft assembly configured to couple to the housing and including an inner shaft member and an outer shaft member movable relative to the inner shaft member, the outer shaft member defining a slot;
• and
• a spring carrier operably supported within the housing and including at least one resilient boss configured to releasably engage the slot defined through the outer shaft member, the at least one resilient boss being disengaged from the slot to release the inner and outer shaft members from the housing when the outer shaft member is rotated with respect to the spring carrier, wherein the spring carrier includes a plurality of radial slots defined on a distal face thereof, the plurality of radial slots configured to engage a corresponding plurality of mating features disposed on an interior wall of the housing when the spring carrier is moved to a forward position within the housing, wherein engagement between the plurality of radial slots and corresponding plurality of mating features inhibits rotation of the spring carrier when the outer shaft member is rotated, thus facilitating release of the inner and outer shaft members from the housing.