A surgical instrument (500) comprising: a body part (512)； a loading unit (16) operatively coupled to the body part (512), including the loading unit (16) a cartridge (54), the cartridge (54) housing a plurality of fasteners (66)； a drive assembly (212) configured to move through the cartridge (54) to eject the fasteners (66) from the cartridge (54)； an indicator assembly (5) that includes an indicator pin (10), the indicator pin (10) being able to pass from a first position to a second position after the ejection of the fasteners (66), the indicator pin (10) being substantially flush with a surface of the cartridge (54) when the indicator pin (10) is in the first position, and extending beyond the surface of the cartridge (54) when the indicator pin (10) is in the second position； and wherein the cartridge (54) includes a distal part, and a longitudinally extending opening (11) is defined within the distal part, the indicating pin (10) being able to be translated through the opening (11)； characterized in that: the indicator assembly (5) further includes a ring (13), the ring (13) positioned within the opening (11), the ring (13) disposed around the indicator pin (10), joining one or plus frangible fingers (12) the indicator pin (10) and the ring (13), the one or more frangible fingers (12) inhibiting the passage of the indicator pin (10) from the first to the second position before the instrument is operated surgical (500), the one or more frangible fingers (12) breaking in response to the operation of the surgical instrument (500).Un instrumento quirúrgico (500) que comprende: una parte de cuerpo (512)； una unidad de carga (16) acoplada de forma operativa a la parte de cuerpo (512), incluyendo la unidad de carga (16) un cartucho (54), albergando el cartucho (54) una pluralidad de fijadores (66)； un conjunto impulsor (212) configurado para trasladarse a través del cartucho (54) para expulsar los fijadores (66) desde el cartucho (54)； un conjunto indicador (5) que
