A surgical stapling apparatus comprising: a body defining a longitudinal axis; an anvil assembly; and a cartridge assembly including: a cartridge (206, 208) including a first half and a second half, the cartridge defining retention slots; a plurality of fasteners disposed in the retention slots, wherein each retention slot includes a staple magazine including a plurality of fasteners therein and a biasing member to move one in the plurality of fasteners of the staple magazine to the corresponding retention slot after a firing of the surgical stapling device; and a plurality of pushers disposed in each of the first and second halves of the cartridge, each pusher being disposed in operative association with at least one of the retention slots of the cartridge assembly and being configured to eject a respective fastener from the at least one retention slot during firing of the surgical stapling apparatus; characterised by a firing cam assembly including a plurality of drive bars, each drive bar including a firing cam disposed at a distal end thereof and configured to translate through the cartridge assembly to engage and drive the pushers to eject the fasteners from the retention slots during firing of the surgical stapling apparatus; each drive bar comprising more than one bar partially attached to each other by adhesives or welding. a body defining a longitudinal axis; an anvil assembly; and a cartridge assembly including: a cartridge (206, 208) including a first half and a second half, the cartridge defining retention slots; a plurality of fasteners disposed in the retention slots, wherein each retention slot includes a staple magazine including a plurality of fasteners therein and a biasing member to move one in the plurality of fasteners of the staple magazine to the corresponding retention slot after a firing of the surgical stapling device; and a plurality of pushers disposed in each of the first and second halves of the cartridge, each pusher being disposed in operative association with at least one of the retention slots of the cartridge assembly and being configured to eject a respective fastener from the at least one retention slot during firing of the surgical stapling apparatus; a cartridge (206, 208) including a first half and a second half, the cartridge defining retention slots; a plurality of fasteners disposed in the retention slots, wherein each retention slot includes a staple magazine including a plurality of fasteners therein and a biasing member to move one in the plurality of fasteners of the staple magazine to the corresponding retention slot after a firing of the surgical stapling device; and a plurality of pushers disposed in each of the first and second halves of the cartridge, each pusher being disposed in operative association with at least one of the retention slots of the cartridge assembly and being configured to eject a respective fastener from the at least one retention slot during firing of the surgical stapling apparatus; characterised by a firing cam assembly including a plurality of drive bars, each drive bar including a firing cam disposed at a distal end thereof and configured to translate through the cartridge assembly to engage and drive the pushers to eject the fasteners from the retention slots during firing of the surgical stapling apparatus; each drive bar comprising more than one bar partially attached to each other by adhesives or welding.