What Makes Good Guns Go Bad?

In the wake of this most recent shooting incident, there is a renewed cry from those on the left to ban guns.   But if we look at the numbers, a bigger question emerges.   What is it that makes a certain number of guns go bad?   It is estimated that we have approximately 330,000,000 guns in the United States, yet the number of crimes committed with guns appears to be in the thousands (less than 500,000) or so are used in crimes of any sort.   Just to be on the safe side let's say it's 1,000,000.    What that means is that less than 0.003% of all guns are used in some sort of crime every year.   But since these guns are environmentally conscious they probably recycle which means that the number of guns used in crimes is most likely less than the number of gun crimes committed.    FYI, I suspect that each gun commits more than one crime per year.   But, let's stick with the 1,000,000 or 0.003% to be safe.

What we are left with is that 99.997% of guns in the Unites States are solid law abiding guns who don't do anything wrong.   

So, once again, what is it about that 0,003% of guns that makes them go bad?   What can we do to help these guns stay away from lives of crime?

Does it really make any sort of rational sense to punish the 99.997% of guns who live their entire lives doing absolutely nothing wrong, for the behavior of the 0.003% of bad ones?