A fastener cartridge comprising a cartridge body comprising a tissue-supporting deck, a longitudinal slot, cavities, and ridges protruding from the tissue-supporting deck is disclosed. The fastener cartridge further comprises fasteners positioned in the cavities, drivers supporting the fasteners, and a sled configured to engage the drivers to fire the fasteners from the cavities during a firing stroke. The sled comprises a central portion and ramps. The ramps comprise a first ramp on a first side of the central portion, a second ramp on the first side of the central portion, a third ramp on a second side of the central portion, and a fourth ramp on the second side of the central portion. The first ramp, the second ramp, and the third ramp are longitudinally-staggered. The central portion comprises a hump intermediate the first ramp and the third ramp, and a stabilizer extending from the hump distally beyond the ramps.