A support assembly for a medicament container of a medicament delivery device is provided with a container support member having a proximal end and a distal end and configured to partially receive a medicament container, a deformable member arranged between a distal portion of the container support element and the proximal end of a flange of the medicament container, a rear support member arranged to be moved in contact with the distal end of the flange of the medicament container; where the deformable member is deformed by a clamping force generated by the container support member and the flange of the medicament container, such that the deformation of the deformable member is configured to compensate an engineering tolerance of the medicament delivery device.