Anvil modification members for surgical staplers

An anvil modification member for use with an anvil of a surgical stapler, wherein the anvil modification member comprises:

• a body;
• an anvil-contacting surface configured to be positioned against the anvil;
• a tissue-contacting surface comprising a plurality of staple-forming pockets;
• and
• at least one attachment feature configured to releasably secure the body to the anvil.

A surgical system, comprising:

• an anvil, comprising:
• an elongate slot extending longitudinally along a length of the anvil;
• and
• a plurality of first staple-forming pockets;
• an anvil modification member releasably attachable to the anvil, wherein the anvil modification member comprises a plurality of second staple-forming pockets;
• and
• a staple cartridge comprising a plurality of staples formable by the plurality of first staple-forming pockets when the anvil modification member is not attached to the anvil, and wherein the staples are formable by the plurality of second staple-forming pockets when the anvil modification member is attached to the anvil.