Fiber optic adapter assemblies including an adapter housing and a locking housing

A fiber optic connector assembly comprising:

• a connector housing defining a rotationally-discrete locking portion defined on an outer surface of the connector housing;
• an adapter assembly selectively coupled to the connector housing, the adapter assembly comprising:
• an adapter housing extending around the connector housing and defining an adapter front end and an adapter retention member that is positionable between an engaged position, in which the adapter retention member restricts movement of the connector housing with respect to the adapter assembly in an axial direction, and a disengaged position, in which the connector housing is movable with respect to the adapter assembly in the axial direction;
• and
• a locking housing positioned between the adapter housing and the connector housing, the locking housing defining a locking front end positionable at least partially within the adapter housing, and a locking retention feature that is engaged with the adapter retention member when the adapter retention member is in the engaged position.