Let’s say that some magical unicorn creates a spell that dissolves all firearms now present in the United States.
Initially, in your hypothetical scenario, there would be the same number of rapes and murders and violent acts there always are (that outnumber gun violence eight to one) that didn’t involve guns in the first place. The difference is that police would have to use tazers to stop criminals. Some criminals (just like some law abiding citizens) don’t fall to the ground and convulse under electrical shock. Some can fight back. So the police would be endangered in your scenario. I personally don’t have the same reaction to Mace that you would expect so I know that there are other people who can be maced and be effective at fighting police. Farmers who rely on firearms to keep wildlife from their livestock would have to use bows and arrows and would suffer monetary loss and the suffering of their livestock being eaten alive by coyotes and wolves and etc. (I can provide video of wolves attacking cattle and actually tearing off pieces while they are still standing)
Bank guards would not have guns to deter robbery so banks would be robbed by any moderately sized group of robbers (five or more with knives or hammers or chainsaws would probably suffice).
The FBI would not have their firearms so kidnappings and child abduction and serial killings would proceed without the safe investigation of those crimes.
Women who have firearms to protect themselves from psychotic ex-husbands or boyfriends would be helpless.
The influx of cartel gang members from Mexico would initially involve machete violence (the reason that any knife longer than 4 inches is illegal to be carried in Texas) and people being beaten to death with pipes and baseball bats. The local gangs who have a reason to keep the areas they live in *relatively* safe and help to curb the cartels will all be wiped out because the cartels will bring in their own firearms from elsewhere. Violent people will have free reign in the inner city because the police who currently will not show up to 911 calls in Chicago unless “you are seriously hurt or someone is killed” can’t be bothered to go to a call when they have no Glocks to keep them safe. As the year passes minorities in the inner city (Asians in primarily Hispanic or Black areas, etc) will become victims of looting and arson. Whole districts of some cities will be unlivable because the police will not enter those locations for fear of gang assaults and rioting.
(Please note that none of this is hyperbole. ALL OF THESE THINGS have happened in recent history and were actually curbed by the liberal application of firearms to the affected areas. Sometimes with National Guard or police holding them and sometimes with Korean property holders or other law-abiding citizens holding them)
(I have video and newspaper records)

A year passes.

Then Obama is tried and convicted of treason and Clint Eastwood is elected president by universal acclaim. The budget is balanced because all of the feel-good legislation designed to remove citizen’s rights is immediately stricken from the books. Clint passes a law that everyone in the United States must immediately spend ten hours in a basic pistol course and take up the responsibility of defending themselves. Clint imports firearms and US manufacturers kick their manufacturing into overdrive. Children are given twenty hours of instruction on gun safety every year from the age of four forward. Gun-Free-Zones are outlawed. Teachers are allowed to pack heat at school and there are armed police or guards as a legal requirement for every single school. EVERYONE over the age of 21 is required by law to learn how to shoot accurately and safely or they will be fined $5000.00 and lose the right to vote and the privilege to drive an automobile. (Medical exceptions for people with unreasonable phobias are allowed. They must pay for a bodyguard to protect them) (this is a hat tip to the current anti-gun politicians and the news media who do exactly this)
For a month or two the violent crimes continue. Then the criminals who have not been arrested or perforated in the commission of crimes wise up and stop doing what they are doing. (for the most part….you can’t legislate or fix stupid) (but the stupid ones end up in jail or perforated so they won’t have ten or twenty kids to continue the stupid)
Clint is wise and spends more money on mental health and economic and social improvements and cuts welfare for anyone who can reasonably hold a job and work. Clint creates multiple jobs programs that show people who have been living on the dole their entire lives that they can gain self respect and support and defend themselves if they just get out and do it. Public works projects are created that allow law-abiding and civic minded people in the inner city to act as a civic watch. “Snitching” about violent crime is encouraged and publicly awarded. Public works projects are created that educate people to the fact that drugging people with mental illness is a temporary solution that actually can make a non-violent person become violent. (read the side effects of the majority of the drugs being prescribed today for people whose personalities simply aren’t easy to deal with) People who are mentally ill are treated without the quick-fix drugs that were the norm under previous health care policies.
As statistics from numerous studies have shown, people are more polite, more courteous, more conscientious about safety and the well being of their fellow man if they are in an armed society.
As statistics have shown, waiting for the police to show up allows a mass shooter to kill 4 to 10 more people than if an armed citizen intervenes.
As statistics and personal experience has shown, waiting for the police to show up can leave you or your loved one bleeding to death or beaten bloody.
Crime will continue. People will die in automobile accidents and will be shot and some will commit suicide and some will still be stupid enough to attack other people. Evil exists. Stupid exists. The difference is that two or three guys will not have the idea in their head that they can invade a home safely and rape and beat and sodomize three women for an entire day without being shot.
Nutbags planning to shoot up a movie theater or a school will have to steel themselves to the idea that Mrs. Ledbetter has Mr. Smith and Wesson to back her up.
Frankly I believe and can prove that most of those nutbags will reconsider.