I always found the 'it's too difficult' argument to be lazy as fuck. I mean, making them illegal would be hard (to put it very mildly), but it would be a simple process if you put politics to one side and amend the constitution that all the retards cling to. I mean, it's as simple as taking steps to reclaim all of the registered guns. Then, you take the ones criminals have as and when you encounter them (coupled with prison terms for the offending persons).
Will you get low lives taking advantage? sure. Political backlash? sure. But more importantly - after a while the instances of gun grime would begin to fall away.
And that's the more extreme option of gun control (the one the gun lobby try to claim is the only other option to MORE GUNZZZ) There are pleanty of less extreme options available.
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I am aware amending the constitution would not be easy