Blind retention mount

A mount assembly (10) includes a main body (18), a bayonet (22), and a block (20). The bayonet is movable relative the main body to insert a portion of the bayonet into an internal cavity (26) of the main body. The block is disposed within the internal cavity and is movable relative to the main body from a first position to a second position. In the first position, the bayonet is captured and held between the block and an inner wall (46) of the internal cavity. In the second position, the block allows the bayonet to be removed from the internal cavity.