A staple cartridge configured for use with a surgical stapling device comprising a lockout for preventing operation of the surgical stapling device, wherein said staple cartridge comprises: a cartridge body, comprising: a proximal end and a distal end portion; a centrally disposed longitudinal slot extending from said proximal end to said distal end portion, wherein said longitudinal slot defines a cartridge axis; and a plurality of longitudinal cam slots (42240, 42242), wherein each said cam slot extends from said proximal end to said distal end portion, and wherein said staple cartridge further comprises: a sled movably supported in said cartridge body, wherein said sled is movable between an unfired position and a fired position within said cartridge body, wherein said sled comprises a plurality of cam members, and wherein each said cam member is slidably received in one of said longitudinal cam slots (42240, 42242); and an authentication ramp extending from said proximal end of said cartridge body, wherein said authentication ramp comprises a ramp surface and is aligned with one of said cam slots, wherein the authentication ramp prevents the sled from falling out of the back of the cartridge body, wherein said ramp surface lies along a ramp axis that is transverse to said cartridge axis, and wherein said ramp surface comprises a first cam surface configured to move the lockout of the surgical stapling device in a direction away from said cartridge axis upon contact therewith when said staple cartridge is initially seated into the surgical stapling device, wherein said cartridge body comprises a cartridge width, wherein said authentication ramp extends from said proximal end of said cartridge body a ramp distance, and wherein said ramp distance is greater than thirty percent of said cartridge width and less than fifty percent of said cartridge width, wherein the authentication ramp has a section extending in parallel to the border of one slot and an angled section preventing further proximal movement of the sled such that it cannot fall out. a cartridge body, comprising: a proximal end and a distal end portion; a centrally disposed longitudinal slot extending from said proximal end to said distal end portion, wherein said longitudinal slot defines a cartridge axis; and a plurality of longitudinal cam slots (42240, 42242), wherein each said cam slot extends from said proximal end to said distal end portion, and wherein said staple cartridge further comprises: a proximal end and a distal end portion; a centrally disposed longitudinal slot extending from said proximal end to said distal end portion, wherein said longitudinal slot defines a cartridge axis; and a plurality of longitudinal cam slots (42240, 42242), wherein each said cam slot extends from said proximal end to said distal end portion, and wherein said staple cartridge further comprises: a sled movably supported in said cartridge body, wherein said sled is movable between an unfired position and a fired position within said cartridge body, wherein said sled comprises a plurality of cam members, and wherein each said cam member is slidably received in one of said longitudinal cam slots (42240, 42242); and an authentication ramp extending from said proximal end of said cartridge body, wherein said authentication ramp comprises a ramp surface and is aligned with one of said cam slots, wherein the authentication ramp prevents the sled from falling out of the back of the cartridge body, wherein said ramp surface lies along a ramp axis that is transverse to said cartridge axis, and wherein said ramp surface comprises a first cam surface configured to move the lockout of the surgical stapling device in a direction away from said cartridge axis upon contact therewith when said staple cartridge is initially seated into the surgical stapling device, wherein said cartridge body comprises a cartridge width, wherein said authentication ramp extends from said proximal end of said cartridge body a ramp distance, and wherein said ramp distance is greater than thirty percent of said cartridge width and less than fifty percent of said cartridge width, wherein the authentication ramp has a section extending in parallel to the border of one slot and an angled section preventing further proximal movement of the sled such that it cannot fall out.