If you listen to the gun control argument, their plan is very clear. They want to "dry up" the supply of guns by eventually banning all guns. When you reply "you leave innocent people defenseless" they reply that's a price THEY are willing to pay..
So how many years of only the criminals being armed will it take to ensure all the guns are gone? Ten? Twenty? More? So how many innocents will be killed by those armed criminals before the illegal guns can all be flushed out?
Even their 'best' arguments are idiotic. And how long would it take to "dry up" the guns that Eric Holder flooded into Mexico? Even if every gun in the US suddenly disappeared, the guns would still exist and come in with the drug mules.