1. A locking bracket system for a pair of line replaceable modules (LRMs), comprising:a locking bracket assembly including:
an expanding member configured to be actuated to expand;
an extension bracket attached to the expanding member, wherein the extension bracket extends from the expanding member in a direction opposite that the expanding member expands, wherein the extension bracket includes one or more guide post holes configured to receive a guide post; and
a guide post disposed in each guide post hole, wherein each guide post is configured to slide in a chassis guide channel defined in the chassis,
wherein each of the expanding member and the extension bracket are configured to compress against a LRM to retain the pair of LRMs to a chassis when the expanding member is in an expanded position.