A connector assembly for mating with a pluggable module includes a receptacle assembly for receiving the pluggable module and an interface electrical connector defining a back of the receptacle assembly. The interface electrical connector is configured to mate with the pluggable module. A guide rail defines a side of the receptacle assembly. The guide rail is configured to guide the pluggable module within the receptacle assembly. The guide rail has a rail body having a cavity and the rail body having a side wall opening open to the cavity. A latch assembly is received in the cavity. The latch assembly includes a latch movable between a latched position and an unlatched position. The latch is configured to extend through the side wall opening to engage the pluggable module when the latch is in the latched position. The latch assembly further includes an actuator that forces the latch from the latched position to the unlatched position.