A surgical instrument includes an end effector, a firing member movable distally from a home position to effect a first firing motion in the end effector, wherein the firing member is movable proximally toward the home position in a return motion, and a lockout pawl. The firing member has a cam slot, a protrusion, and a retaining pocket. The lockout pawl has a cam feature receivable in the cam slot during the return motion, wherein the cam slot is configured to guide the cam feature and move the lockout pawl toward a locking engagement with the protrusion to prevent a second firing motion of the firing member, and wherein the retaining pocket is configured to receive the cam feature to releasably secure the firing member to the lockout pawl when the firing member is in the home position.