Abstract: An optical sight includes a housing, a relay assembly, and a biasing element. The relay assembly has at least one optical element, a main tube, a track tube with at least one track, and a reticle assembly. The track tube is selectively rotatable relative to and about the main tube to adjust an axial position of the at least one optical element within the main tube along an axis that is substantially parallel to a longitudinal axis of the main tube. The reticle assembly further includes at least one optical element. The biasing element includes a mounting strap that is fixed to an inner surface of the housing and a spring having an engagement surface that contacts the relay assembly and exerts a force on the relay assembly. The engagement surface is on a radially inner side of the spring opposite a radially outer side facing the mounting strap.