A rail system for retaining cargo payload has a longitudinal inboard rail and an opposing longitudinal outboard rail. The inboard rail has a recess extending longitudinally for sliding receipt of a lip on a payload. A latch plate extends at least partially into the recess for engagement with the payload. The latch plate is pivotable from an engaged position retaining the payload in a fore-and-aft position to a disengaged position releasing the fore-and-aft retention optionally by a lever system.