Hubley had their beginnings in the late 19th century, and would go on to produce various models of diecast Western-style cap guns. The Atomic Disintegrator was their entry into the world of science-fiction weaponry, and an early one at that.
The design embodies the sort of futuristic forward-looking that was commonplace in the immediately postwar, pre-Cold War standoff world. The gun features a fat barrel with bellows-like flanges toward the front; along the top sits a small amount of cool-looking mechanical stuff. The words Atomic Disintegrator are clearly printed on both sids; on the port side is also a dial with readings between 100 and 500 (for the user to gauge how much atomic disintegration he's unleashing - less for people, more for bigger objects, presumably). The molded pistol grip completes the exotic look.
Although not really uncommon, the Atomic Disintegrator still commands a respectable price when found in decent condition. Boxes for it, however, are particularly rare, and bring very high prices when found.