An end effector for a surgical stapling instrument, comprising: a staple cartridge, comprising: a deck comprising a top surface; and a plurality of staples at least partially extending through said deck, wherein each said staple comprises a base and two legs extending from the base, wherein said deck is slidable relative to said staples between an unfired position and a fired position; a support jaw, comprising: a frame; a plurality of stationary drivers extending from said frame and immovable relative to the support jaw, wherein each said stationary driver has the base of a said staple positioned over its top surface such that the stationary driver is configured to support the staple when said deck is moved into said fired position, and wherein said top surface of said deck is positioned above said stationary drivers when said deck is in said unfired position; and a well defined intermediate said stationary drivers, wherein said well is configured to receive said deck when said deck is in said fired position; and an anvil jaw movably attached to said support jaw, wherein said anvil jaw is movable between an unfired position and a fired position, said anvil jaw comprising: a tissue-contacting surface; and a plurality of staple pockets configured to deform the staples wherein said anvil jaw is configured to drive said deck between its unfired position and its fired position and to deform said staples in said staple pockets as said anvil jaw is moved between its unfired position and its fired position; and wherein said deck further comprises a plurality of apertures configured to receive said stationary drivers when said deck is moved into said fired position, characterized in that said stationary drivers are configured to engage the sidewalls of said apertures in a press-fit manner. a staple cartridge, comprising: a deck comprising a top surface; and a plurality of staples at least partially extending through said deck, wherein each said staple comprises a base and two legs extending from the base, wherein said deck is slidable relative to said staples between an unfired position and a fired position; a deck comprising a top surface; and a plurality of staples at least partially extending through said deck, a support jaw, comprising: a frame; a plurality of stationary drivers extending from said frame and immovable relative to the support jaw, wherein each said stationary driver has the base of a said staple positioned over its top surface such that the stationary driver is configured to support the staple when said deck is moved into said fired position, and wherein said top surface of said deck is positioned above said stationary drivers when said deck is in said unfired position; and a well defined intermediate said stationary drivers, wherein said well is configured to receive said deck when said deck is in said fired position; and a frame; a plurality of stationary drivers extending from said frame and immovable relative to the support jaw, wherein each said stationary driver has the base of a said staple positioned over its top surface such that the stationary driver is configured to support the staple when said deck is moved into said fired position, and wherein said top surface of said deck is positioned above said stationary drivers when said deck is in said unfired position; and a well defined intermediate said stationary drivers, wherein said well is configured to receive said deck when said deck is in said fired position; and an anvil jaw movably attached to said support jaw, wherein said anvil jaw is movable between an unfired position and a fired position, said anvil jaw comprising: a tissue-contacting surface; and a plurality of staple pockets configured to deform the staples a tissue-contacting surface; and a plurality of staple pockets configured to deform the staples wherein said anvil jaw is configured to drive said deck between its unfired position and its fired position and to deform said staples in said staple pockets as said anvil jaw is moved between its unfired position and its fired position; and wherein said deck further comprises a plurality of apertures configured to receive said stationary drivers when said deck is moved into said fired position, characterized in that said stationary drivers are configured to engage the sidewalls of said apertures in a press-fit manner.