Apparatus and methods for removably securing payloads are disclosed. In one embodiment, a method includes coupling the payload to a body of a locking assembly, engaging an insertion portion of the body into a channel of a track, translating the insertion portion to a second position until at least one self-alignment feature of the locking assembly abuts an abutment portion of the track, the body being substantially constrained from movement away from the track in the second position, and actuating at least one engagement member to a secured position, the body being substantially constrained from movement along the track in the secured position. In an alternate embodiment, in the unsecured position the at least one engagement member is withdrawn from the channel, and in the secured position the at least one engagement member projects into the channel.