A surgical instrument includes a housing, first, second, and third actuators operably coupled to the housing, an at least partially semi-rigid shaft extending distally from the housing, an end effector assembly disposed at a distal end of the shaft, and first, second, and third bars extending through the shaft in non-coaxial arrangement. The first bar is operably coupled between the first actuator and the end effector assembly such that actuation thereof effects manipulation of the end effector assembly. The second bar is operably coupled between the second actuator and a first deployable component such that actuation thereof effects deployment of the first deployable component relative to the end effector assembly. The third bar is operably coupled between the third actuator and a second deployable component such that actuation thereof effects deployment of the second deployable component relative to the end effector assembly.