A stapling reload assembly for a circular stapling instrument includes acasing, a staple holder, a staple driver, and an anvil assembly. The stapleholder isattached to the casing. The staple driver includes a driver alignment surface.Thestaple driver is receivable within the casing and is configured to move withinthecasing from a pre-fired position to a fired position. The anvil assemblyincludesan anvil base surface, an anvil alignment surface, and a staple formingsurface.The anvil base surface is configured to move from an open position away fromthecasing to a closed position adjacent the casing. The anvil alignment surfaceisconfigured to mate with the driver alignment surface, to rotationally alignthestaple forming surface with the staple holder, when the anvil base surface isin theclosed position.
