Actually, there was never an executive order in 1989. The ATF had already banned 43 guns from importation, and the President allowed that ban to stand.
Never said there was an executive order in 1989 w/regards to firearms. It is, however, a clear example of executive power being used for the purpose of gun control. If the Obama Administration uses executive power to implement more gun control measures than it already has, I suspect it would follow the examples set by previous Presidents.