A system for controlling advancement of and access to product housed within a device. Systems and devices include a pushing assembly having a track, a pusher, and a stop for restricting forward movement of the pusher when the stop is engaged. The device also includes a door assembly that has an open position and a closed position, an engaging mechanism that engages the stop when the door assembly is in the open position, and a blocker mechanism that restricts consumer access to product located behind the door assembly.