Abstract: Modular skid units are provided that are versatile and easily configurable for particular applications. In some examples, a modular design allows for many different combinations of modular components, such as seats, canine boxes, storage boxes, patient transport units, etc. In some examples, the modular and quick release nature of the system enables users to selectively remove and attach the modular components as needed for a given task, including the ability to quickly and easily change the modular components in the field to meet the specific needs of a mission or task. In some examples, the modular components include quick release locking mechanisms that include a set of locking elements for quickly and easily switching components.