Answer by  myself. Support tell us that this switches use special veriosn of FOS and actual version v8.1.0_lnx3.
Hello! MXG610s already have fos 8.1.0 version, we would like upgrade firmware to 8.2.x. Anyone know where we can download latest fos for this switch? In fos 8.2.2b we cant find HW Type 175.52.   
MXG610s switch firmware download