An exemplary surgical apparatus for treating tissue may include an anvil a jaw pivotally connected to the anvil and a first cartridge detachably connected to the anvil, holding staples of a first size where a first clamp gap between the anvil and first cartridge is set by the connection between the first cartridge and jaw. An exemplary cartridge for a surgical stapler may include a cartridge housing a plurality of staples held within the cartridge housing and a sled slidable within, and retained by, the cartridge housing, including a central platform, at least one wedge connected to the central platform, and a knife rotatable relative to the central platform.