A weight set hanger system comprising: a hanger comprising a hanger shoulder; a spool body a rotationally fixed packoff body resting on the hanger shoulder, the rotationally fixed packoff body comprising a first load shoulder, a second load shoulder, and a plurality of seals; a first locking ring positioned on the first load shoulder and projecting inward; a second locking ring positioned on the second load shoulder and projecting outward; and an actuating ring located above the packoff body and first and second locking rings (40,41) and comprising a first angled face, and a second angled face; characterized in that: the actuating ring further comprises a plurality of spring-loaded locking pin assemblies; and in that, in use, the actuating ring is configured to transmit a pressure to the rotationally fixed packoff body, wherein, in use, the first load shoulder and the first angled face are configured to force the first locking ring away from the actuating ring in a respective groove of the hanger, wherein, in use, the second load shoulder and the second angled face are configured to force the second locking ring away from the actuating ring in a respective groove of the spool body, wherein, in use, the plurality of spring-loaded locking pin assemblies are configured to spring towards the hanger, and wherein the plurality of seals seal against the hanger. a hanger comprising a hanger shoulder; a spool body a rotationally fixed packoff body resting on the hanger shoulder, the rotationally fixed packoff body comprising a first load shoulder, a second load shoulder, and a plurality of seals; a first locking ring positioned on the first load shoulder and projecting inward; a second locking ring positioned on the second load shoulder and projecting outward; and an actuating ring located above the packoff body and first and second locking rings (40,41) and comprising a first angled face, and a second angled face; characterized in that: the actuating ring further comprises a plurality of spring-loaded locking pin assemblies; and in that, in use, the actuating ring is configured to transmit a pressure to the rotationally fixed packoff body, wherein, in use, the first load shoulder and the first angled face are configured to force the first locking ring away from the actuating ring in a respective groove of the hanger, wherein, in use, the second load shoulder and the second angled face are configured to force the second locking ring away from the actuating ring in a respective groove of the spool body, wherein, in use, the plurality of spring-loaded locking pin assemblies are configured to spring towards the hanger, and wherein the plurality of seals seal against the hanger. the actuating ring further comprises a plurality of spring-loaded locking pin assemblies; and in that, in use, the actuating ring is configured to transmit a pressure to the rotationally fixed packoff body, wherein, in use, the first load shoulder and the first angled face are configured to force the first locking ring away from the actuating ring in a respective groove of the hanger, wherein, in use, the second load shoulder and the second angled face are configured to force the second locking ring away from the actuating ring in a respective groove of the spool body, wherein, in use, the plurality of spring-loaded locking pin assemblies are configured to spring towards the hanger, and wherein the plurality of seals seal against the hanger.