Sub-assembly for a medicament delivery device

A sub-assembly for a medicament delivery device, comprising:

• a housing;
• a delivery member cover arranged in the housing and configured to move axially in the housing from an extended position towards a retracted position, the delivery member cover having a radial wall provided with an axial through-opening;
• and
• a removable cap assembly, the removable cap assembly comprising:
• a cap configured to be fitted to the delivery member cover and/or to the housing, the cap having a proximal cap end and a distal cap end;
• a delivery member shield gripping sleeve having a radially flexible axially extending arm,
• wherein the delivery member shield gripping sleeve is arranged in the cap and the delivery member shield gripping sleeve is configured to slide in the cap towards the distal cap end from an initial position in which the arm extends through the through-opening of the delivery member cover, to a second position when the cap is pulled from the delivery member cover,
• wherein the cap assembly comprises an axial structure configured to extend parallel with the delivery member shield gripping sleeve when the delivery member shield gripping sleeve is in the initial position to restrict radial inwards movement of the arm so that the arm has a radial dimension that extends beyond a radial dimension of the through-opening, thereby preventing the delivery member cover to move towards the retracted position, and
• wherein the delivery member shield gripping sleeve is configured to move relative to the axial structure when the delivery member shield gripping sleeve is moved towards the second position, enabling the arm to flex radially inwards and move through the through-opening of the delivery member cover.