A surgical instrument comprising: (a) an anvil; (b) a staple applying assembly, wherein the staple applying assembly comprises: (i) a distal surface defining openings, and (ii) a driver operable to drive an annular array of staples through the openings of the distal surface and into tissue; (c) an adjustment member, wherein the adjustment member is operable to adjust the position of the anvil to thereby vary a gap distance defined between the anvil and the distal surface, wherein the adjustment member comprises: (i) a first section, and (ii) a second section, wherein the first and second sections are configured to cooperate in a state of tension to maintain a selected gap distance between the anvil and the distal surface; (d) a user input feature in communication with the driver, wherein user input feature is operable to actuate the driver to thereby drive the staples; and a bailout assembly in communication with the adjustment member, wherein the bailout assembly is operable to selectively separate the first section of the adjustment member from the second section of the adjustment member to thereby relieve the tension; and a knife member, characterised in that the staple applying assembly further comprises: (i) at least one pin, wherein the at least one pin couples the knife member with the driver such that the driver is operable to drive the knife through tissue in addition to driving staples through tissue, and (ii) a pin removal feature operable to selectively remove the pin to thereby selectively decouple the knife member from the driver. (a) an anvil; (b) a staple applying assembly, wherein the staple applying assembly comprises: (i) a distal surface defining openings, and (ii) a driver operable to drive an annular array of staples through the openings of the distal surface and into tissue; (i) a distal surface defining openings, and (ii) a driver operable to drive an annular array of staples through the openings of the distal surface and into tissue; (c) an adjustment member, wherein the adjustment member is operable to adjust the position of the anvil to thereby vary a gap distance defined between the anvil and the distal surface, wherein the adjustment member comprises: (i) a first section, and (ii) a second section, wherein the first and second sections are configured to cooperate in a state of tension to maintain a selected gap distance between the anvil and the distal surface; (i) a first section, and (ii) a second section, wherein the first and second sections are configured to cooperate in a state of tension to maintain a selected gap distance between the anvil and the distal surface; (d) a user input feature in communication with the driver, wherein user input feature is operable to actuate the driver to thereby drive the staples; and a bailout assembly in communication with the adjustment member, wherein the bailout assembly is operable to selectively separate the first section of the adjustment member from the second section of the adjustment member to thereby relieve the tension; and a knife member, characterised in that the staple applying assembly further comprises: (i) at least one pin, wherein the at least one pin couples the knife member with the driver such that the driver is operable to drive the knife through tissue in addition to driving staples through tissue, and (ii) a pin removal feature operable to selectively remove the pin to thereby selectively decouple the knife member from the driver. (i) at least one pin, wherein the at least one pin couples the knife member with the driver such that the driver is operable to drive the knife through tissue in addition to driving staples through tissue, and (ii) a pin removal feature operable to selectively remove the pin to thereby selectively decouple the knife member from the driver.