An apparatus comprising: (a) an instrument comprising: i. a handle portion, and ii. an end effector extending proximally from the handle portion, wherein the end effector comprises a lower jaw and a upper jaw; (b) a lower staple cartridge insertable into the lower jaw of the end effector, the lower staple cartridge comprising: i. a first cartridge body having an upper deck, the upper deck comprising a first plurality of staple apertures formed therein, ii. a first plurality of staple drivers movable relative to the first cartridge body, and iii. a first plurality of staples in communication with the first plurality of staple drivers, wherein the first plurality of staples are movable relative to the first cartridge body; and (c) an upper staple cartridge insertable into the upper jaw of the end effector, the upper staple cartridge comprising: i. a second cartridge body having an lower deck, the lower deck comprising a second plurality of staple apertures formed therein, ii. a second plurality staple drivers movable relative to the second cartridge body, and iii. a second plurality of staples in communication with the second plurality of staple drivers, wherein the second plurality of staples are movable relative to the second cartridge body, characterised in that either: (a) the first plurality of staple drivers are disposed at a non-perpendicular angle relative to the upper deck, and at least one staple driver of the first plurality of staple drivers is pivotably coupled to an actuation member, wherein the actuation member is operable to pivot the at least one staple driver to a position in which the at least one staple driver is substantially perpendicular relative to the upper deck; or (b) the second plurality of staple drivers are disposed at a non-perpendicular angle relative to the lower deck, and at least one staple driver of the second plurality of staple drivers is pivotably coupled to an actuation member, wherein the actuation member is operable to pivot the at least one staple driver to a position in which the at least one staple driver is substantially perpendicular relative to the lower deck. (a) an instrument comprising: i. a handle portion, and ii. an end effector extending proximally from the handle portion, wherein the end effector comprises a lower jaw and a upper jaw; i. a handle portion, and ii. an end effector extending proximally from the handle portion, wherein the end effector comprises a lower jaw and a upper jaw; (b) a lower staple cartridge insertable into the lower jaw of the end effector, the lower staple cartridge comprising: i. a first cartridge body having an upper deck, the upper deck comprising a first plurality of staple apertures formed therein, ii. a first plurality of staple drivers movable relative to the first cartridge body, and iii. a first plurality of staples in communication with the first plurality of staple drivers, wherein the first plurality of staples are movable relative to the first cartridge body; and i. a first cartridge body having an upper deck, the upper deck comprising a first plurality of staple apertures formed therein, ii. a first plurality of staple drivers movable relative to the first cartridge body, and iii. a first plurality of staples in communication with the first plurality of staple drivers, wherein the first plurality of staples are movable relative to the first cartridge body; and (c) an upper staple cartridge insertable into the upper jaw of the end effector, the upper staple cartridge comprising: i. a second cartridge body having an lower deck, the lower deck comprising a second plurality of staple apertures formed therein, ii. a second plurality staple drivers movable relative to the second cartridge body, and iii. a second plurality of staples in communication with the second plurality of staple drivers, wherein the second plurality of staples are movable relative to the second cartridge body, i. a second cartridge body having an lower deck, the lower deck comprising a second plurality of staple apertures formed therein, ii. a second plurality staple drivers movable relative to the second cartridge body, and iii. a second plurality of staples in communication with the second plurality of staple drivers, wherein the second plurality of staples are movable relative to the second cartridge body, (a) the first plurality of staple drivers are disposed at a non-perpendicular angle relative to the upper deck, and at least one staple driver of the first plurality of staple drivers is pivotably coupled to an actuation member, wherein the actuation member is operable to pivot the at least one staple driver to a position in which the at least one staple driver is substantially perpendicular relative to the upper deck; or (b) the second plurality of staple drivers are disposed at a non-perpendicular angle relative to the lower deck, and at least one staple driver of the second plurality of staple drivers is pivotably coupled to an actuation member, wherein the actuation member is operable to pivot the at least one staple driver to a position in which the at least one staple driver is substantially perpendicular relative to the lower deck.