An adjustable mount assembly and a related rack mount system are provided. The adjustable mount assembly is adapted for mounting a user interaction device outward from a cabinet structure comprising a first surface and a second surface adjacent to the first surface. The adjustable mount assembly comprises a moving member movable substantially horizontally with respect to the first surface. The adjustable mount assembly further comprises an adjustable frame member coupled to the moving member for mounting the user interaction device, wherein a length of the adjustable frame member is adjustable with respect to the second surface. In accordance with an embodiment, the adjustable frame member comprises a two-fold sliding track, wherein the two-fold sliding track comprises a first fold slidably mounted on the first surface and a second fold fixedly holding the user interaction device.