Responsible home protection means you use frangible rounds, they don't penetrate worth a shit, barely make it through dry wall, but they stop an attacker cold. You can make bullets non existent and that won't stop people from shooting, Personally I can reload 15,000 rounds of various hand and rifle calibers with the stock I have on hand. The black powder rifles don't use modern cartridges (what in layman's terms people call a bullet) and if you get shot by one of them it leaves a huge hole .50 caliber. We won the revolution without cartridges.
You can own tanks, jets, helicopters, artillery. Some people think an assault rifle makes you a god. In modern war (Iraq) it takes about 250,000 rounds fired to get one confirmed kill. Large capacity Assault rifles hold 20-30 rounds in the magazine, your gonna need a lot of magazines if you are an average army shooter.
In the US we have about 80,000 people killed each year by guns. In contrast Smoking kills 435,000 each year, Being overweight kills 400,000, heart disease kills 910,000 each year. Accidents take 106,000. Cancer claims 434,000 lives. 106,000 deaths occur each year due to adverse effects to properly prescribed medications. You Would do much better to take any of these other issues on than to try and take something away from the good people of this country. At least that way you will be viewed as someone who wants to help others instead of harm.