A surgical end effector (1000) is disclosed. The surgical end effector can comprise a shaft (1080) and a pair of jaws (1020,1040). The surgical end effector can further comprise a housing (1010) and a drive system, which can be positioned within the housing (12). The drive system can comprise a proximal assembly and a distal assembly, wherein the proximal assembly can be releasably coupled to the distal assembly by a pin (3099).