We don’t know much about this setup, but you can see additional storage boxes housing multiple guns installed beneath the rocker panels on this lifted truck.
This next table from Pinterest. While is does go against our grain in displaying an M1 under glass on top, it still conceals a number of other long guns in a hidden drawer below.
This walnut and maple humidor featured on CustomMade.com features a false bottom with a secret drawer below. The front panel pulls out from its false dovetail joints to reveal the hidden compartment drawer.