Yes. When the Founders recognized the natural right to arms in the Second Amendment, there were no limits on the types of arms contemplated. “Shall not be infringed” is not complicated or vague language. The musket was the “military-style assault weapon” of its day. While self-defense and hunting were two obvious purposes for bearing arms in 1791, Madison wrote of the essential nature of an armed citizenry in guaranteeing security from the kind of tyranny his generation had just defeated with privately-owned arms. The idea that the Founders might support the idea that citizens should be limited to arms less capable than those possessed by agents of aspiring tyrants is simply nonsensical.
It depends. The Supreme Court's Heller decision stated that "dangerous and unusual arms" are outside the Second Amendment's protection. The Court specifically pointed to machine guns, and similar reasoning would exclude bazookas, sarin gas, nuclear bombs, and so on. The Court said that the Second Amendment protects arms in "common use" that are "typically used by law-abiding citizens for lawful purposes." Paradigmatically, this includes handguns. Properly applied, the Heller test forbids bans (but allows some regulation) for common rifles and shotguns, as well as for edged weapons (e.g. knives), blunt weapons (batons), stun guns, and defensive sprays.
If you take away arms from the citizens lawfully buying them you turn it into the hands of the criminals who will always find a way to secure them
The second amendment does not put restrictions on the firearms citizens can own. It states "a well armed..."
That gives us the right own what ever firearm it takes to protect ourselves from anyone we need to, including our own government if it becomes abusive towards the rights and freedoms.
It can potentially be dangerous. Sadly, I believe one of two things will solve our "gun problem" (A). Switzerland, for example. Every law abiding citizen owns a gun, and they're also automatically on reserve for military service. (B). Amsterdam, for example. Only police and militia are allowed to have firearms. If you're caught with one, its a very lengthy prison sentence. We either need to require all law abiding citizens with a clean bill of health to have a firearm. Or outlaw all firearms.