An apparatus for operating on tissue includes an end effector having a first jaw and a second jaw that pivots relative to the first jaw from a closed position to an open position. The second jaw includes a first portion and a second portion that pivots relative to the first portion. The second portion is positioned adjacent to the first portion of the second jaw when the second jaw is in the closed position. The first and second portions of the second jaw pivot outwardly as the second jaw is pivoted from the closed position to the open position.
