A surgical stapler (2, 200) comprising: an actuation device; a reload releasably secured to the actuation device, the reload including a body portion and a tool assembly (16, 214), the body portion including a large diameter portion defining a first diameter and a small diameter portion defining a second diameter extending distally from the large diameter portion, the tool assembly being supported on a distal end of the small diameter portion, wherein the small diameter portion is dimensioned to pass through an 8 mm trocar, the tool assembly including a staple cartridge body (92, 234) with a sled (116, 242) having a single wedge (166, 168) on each of two sides; a lockout assembly including a locking member supported within the large diameter portion of the body portion, wherein the large diameter portion of the body portion of the reload includes a housing (34a, 34b) and the locking member is supported within the housing and is movable from a first position wherein the locking member engages the drive assembly and maintains the drive assembly in a retracted position to a second position wherein the locking member permits distal movement of the drive assembly relative to the housing portion, wherein the lockout assembly includes a rotatable sleeve mounted about the large diameter portion of the reload, the rotatable sleeve engaged with the locking member such that rotation of the rotatable sleeve about the large diameter portion of the reload effects movement of the locking member from the first position to the second position, characterized in that the rotatable sleeve defines a cam slot and the locking member includes a cam finger that is received in the cam slot, wherein rotation of the rotatable sleeve about the large diameter portion of the reload causes the rotatable sleeve to engage the cam finger to move the locking member from the first position to the second position. an actuation device; a reload releasably secured to the actuation device, the reload including a body portion and a tool assembly (16, 214), the body portion including a large diameter portion defining a first diameter and a small diameter portion defining a second diameter extending distally from the large diameter portion, the tool assembly being supported on a distal end of the small diameter portion, wherein the small diameter portion is dimensioned to pass through an 8 mm trocar, the tool assembly including a staple cartridge body (92, 234) with a sled (116, 242) having a single wedge (166, 168) on each of two sides; a lockout assembly including a locking member supported within the large diameter portion of the body portion, wherein the large diameter portion of the body portion of the reload includes a housing (34a, 34b) and the locking member is supported within the housing and is movable from a first position wherein the locking member engages the drive assembly and maintains the drive assembly in a retracted position to a second position wherein the locking member permits distal movement of the drive assembly relative to the housing portion, wherein the lockout assembly includes a rotatable sleeve mounted about the large diameter portion of the reload, the rotatable sleeve engaged with the locking member such that rotation of the rotatable sleeve about the large diameter portion of the reload effects movement of the locking member from the first position to the second position, characterized in that the rotatable sleeve defines a cam slot and the locking member includes a cam finger that is received in the cam slot, wherein rotation of the rotatable sleeve about the large diameter portion of the reload causes the rotatable sleeve to engage the cam finger to move the locking member from the first position to the second position.