Well, if you're gonna play, I can hardly stand on the sidelines, can I?
1. No further importation of foreign-made firearms. If their people can't have them, why should they make money from our blood?
2. No further sale or transfer of any firearm capable of accepting a detachable box magazine. If you can't get the job done with a lever-action, a bolt-action, a pump-action shotgun, a semi-auto with a fixed magazine holding no more than 10 rounds, or a revolver, you're too bad a shot to own a gun anyhow.
3. Ownership and carriage of handguns at the discretion of the government, and available only to people with the equivalent background check to that of a Top Secret security clearance, or to members of the militia, defined as police officers, firearms-licensed security guards, or members of the state National Guard. Those persons pay for the privilege by being available for call-up as needed in cases of riot, civil insurrection, or natural or man-made disaster.
4. Ammunition kept in the home limited to 20 rounds. If you want to pop off 100 rounds, you buy it at the range and use it there. If you do the kind of hunting that requires 20+ rounds, you show a license and get special permission, limited in time. All ammo sales tracked via internet.
5. All illegal weapons seized by law enforcement at any level are to be destroyed, not auctioned off nor kept as keepsakes by the cops.
6. Mandatory training for all persons who wish to own a firearm. Two weeks, in residence, at the expense of the applicant.
7. Persons convicted of felonies of any kind or misdemeanors in which violence is involved lose all right to own a gun for life. (Exception for simple assault in a hand-to-hand fight, provided no weapons of any kind were used. Shows the right mindset.)
8. Seizure of weapons in any case of a mental-health hold or a civil case or application of a protective order where violence or a reasonable threat of violence is involved. Return of weapons at the discretion of the judge supervising the case.
And that's the lot. Keeps pissed-off teenagers from buying high-capacity weapons, reload times on the weapons permitted gives potential victims time to fight or flee, and sharply reduces handguns, which are used in 95% of firearms homicides in the U.S. Expensive? You bet. That's the point.