It is important, however, for conscientious policymakers to consider not only the stated goals of gun control regulations, but the actual results that they produce.That, right there, is the problem. Leftists don't care if the legislation works. As long as they give the apperance of doing something and they're doing so with all the best intentions, results don't matter.
But that is the problem -- liberals/Progscum never state the real purpose of an overarching concept like gun control. Gun control ensures that they will be able to put boot on the throats of their adversaries. There is no other end in view.