An actuator assembly, comprising: a housing assembly; a ball screw rotationally mounted on and extending from the housing assembly, the ball screw coupled to receive an actuator drive torque and configured, upon receipt thereof, to rotate; a ball nut rotationally supported on the ball screw and configured, in response to rotation of the ball screw, to translate thereon between a stowed position and a deployed position; and a lock disposed at least partially within the housing assembly and configured to move between a lock position and an unlock position, wherein: the lock comprises a main body having an actuation end and an engagement end, the engagement end including a first tapered surface, the main body rotationally mounted on the housing assembly between the actuation end and the engagement end, the main body configured, upon receipt of an actuation force on the actuation end, to rotate between the lock position and the unlock position, the engagement end engages the ball nut and thereby prevents the ball nut from translating out of the stowed position when (i) the lock is in the lock position and (ii) the ball nut is in the stowed position, the ball nut includes a second tapered surface, and the first tapered surface engages the second tapered surface when the ball nut translates from the deployed position back to the stowed position, and allows the ball nut to translate from the deployed position back to the stowed position when the lock is in the lock position and the ball nut is not in the stowed position. a housing assembly; a ball screw rotationally mounted on and extending from the housing assembly, the ball screw coupled to receive an actuator drive torque and configured, upon receipt thereof, to rotate; a ball nut rotationally supported on the ball screw and configured, in response to rotation of the ball screw, to translate thereon between a stowed position and a deployed position; and a lock disposed at least partially within the housing assembly and configured to move between a lock position and an unlock position, wherein: the lock comprises a main body having an actuation end and an engagement end, the engagement end including a first tapered surface, the main body rotationally mounted on the housing assembly between the actuation end and the engagement end, the main body configured, upon receipt of an actuation force on the actuation end, to rotate between the lock position and the unlock position, the engagement end engages the ball nut and thereby prevents the ball nut from translating out of the stowed position when (i) the lock is in the lock position and (ii) the ball nut is in the stowed position, the ball nut includes a second tapered surface, and the first tapered surface engages the second tapered surface when the ball nut translates from the deployed position back to the stowed position, and allows the ball nut to translate from the deployed position back to the stowed position when the lock is in the lock position and the ball nut is not in the stowed position. the lock comprises a main body having an actuation end and an engagement end, the engagement end including a first tapered surface, the main body rotationally mounted on the housing assembly between the actuation end and the engagement end, the main body configured, upon receipt of an actuation force on the actuation end, to rotate between the lock position and the unlock position, the engagement end engages the ball nut and thereby prevents the ball nut from translating out of the stowed position when (i) the lock is in the lock position and (ii) the ball nut is in the stowed position, the ball nut includes a second tapered surface, and the first tapered surface engages the second tapered surface when the ball nut translates from the deployed position back to the stowed position, and allows the ball nut to translate from the deployed position back to the stowed position when the lock is in the lock position and the ball nut is not in the stowed position.