Addressing his 'assault rifle comment:
1. The Second Amendment isn't about hunting and was not written with hunting in mind.
To prove this we can look at quotes from the Founding Fathers. Note that they refer to 'arms' and 'weapons', as oppose to guns or firearms. Terms which might be used to describe hunting or target guns. Nobody would take a 'weapon' after a target. :
"And that the said Constitution be never construed to authorize Congress to prevent the people of the United States, who are peaceable citizens, from keeping their own arms....." Samuel Adams, United States Congress, Bill of Rights Ratification, 1779
"It is because the people are citizens that they are with safety armed. The danger (where there is any) from armed citizens, is only to the government, not to the society." Joel Barlow: Equality in America, 1792
"No free government was ever founded, or ever preserved its liberty, without uniting the characters of citizen and soldier in those destined for the defense of the State. Such are a well regulated Militia, composed of the freeholders, citizen, and husbandman; who take up arms to preserve their property, as individuals, and their rights as freemen." James Madison, United States Congress, Bill of Rights Ratification, 1779
"Arms discourage and keep the invader and plunderer in awe, and preserve order in the world as well as property...Horrid mischief would ensue were the law abiding deprived the use of them." Thomas Paine, 1775.
"The supreme power in America cannot enforce unjust laws by the sword, because the whole body of the people are armed and constitute a force superior to any band of regular troops." Noah Webster, "An Examination into the Leading Principles of the Federal Constitution" (1787)
"To disarm the people - that was the best and most effective way to enslave them ...." George Mason ( Framer of the Declaration of Rights, Virginia, 1776, which became the basis for the U.S. Bill of Rights ) 3 Elliot, Debate at 380.
"The people are not to be disarmed of their weapons. They are left in full possession of them." Zachariah Johnson, 3 Elliot, Debate at 646
"The great object is that every man be armed" and "everyone who is able may have a gun." Patrick Henry, in the Virginia Convention on the ratification of the U.S. Constitution.
"The best we can hope for concerning the people at large is that they be properly armed." Alexander Hamilton
"That the said Constitution shall never be construed to authorize Congress to infringe the just liberty of the press or the rights of conscience; or to prevent the people of the United States who are peaceable citizens from keeping their own arms ...." Samuel Adams, "Philadelphia Independent Gazetteer", August 20, 1789
"No Freeman shall be debarred the use of arms in his own lands or tenements." Thomas Jefferson, from the Virginia Constitution, Third Draft
"the people are confirmed by the next article [the Second Amendment] in their right to keep and bear their private arms." Trench Coxe in "Remarks on the First Part of the Amendments to the Federal Constitution", under the pseudonym "A Pennsylvanian" in the Philadelphia Federal Gazette, 18 June 1789
"Arms in the hands of citizens [may] be used at individual discretion...in private self-defense..." John Adams, A Defense of the Constitutions of the Government of the UAS, 471 (1788)
2. In U.S. v. Miller (1939)
http://caselaw.lp.findlaw.com/scripts/getcase.pl?court=us&vol=307&invol=174 The court stated:
"... these men were expected to appear bearing arms supplied by themselves and of the kind in common use at the time. "
The M16 and M4 are the assault rifles 'in common use' right now. Therefore, the semiautomatic versions of the M16 are EXACTLY the type of rifles protected by the Second Amendment. If anything, the Second does not protect double barrel shotguns or single shot target rifles.
As far as his comment on keeping our freedoms, the Founding Fathers intended the Second Amendment as the means to protect our rights. As shown below:
"...but if circumstances should at any time oblige the government to form an army of any magnitude that army can never be formidable to the liberties of the people while there is a large body of citizens, little if at all inferior to them in discipline and the use of arms, who stand ready to defend their own rights and those of their fellow-citizens. Where in the name of common sense are our fears to end if we may not trust our sons, our brothers, our neighbors, our fellow-citizens?" "The Federalist" (No. 29) Alexander Hamilton
"To these would be opposed a militia amounting to near half a million of citizens with arms in their hands... Besides the advantage of being armed, which the Americans possess over the people of almost every other nation,... Notwithstanding the military establishments in the several kingdoms of Europe, which are carried as far as the public resources will bear, the governments are afraid to trust the people with arms... Let us not insult the free and gallant citizens of America with the suspicion that they would be less able to defend the rights of which they would be in actual possession than the debased subjects of arbitrary power would be to rescue theirs from the hands of their oppressors.
"The Federalist" (No. 46) James Madison
"To preserve liberty, it is essential that the whole body of people always possess arms, and be taught alike especially when young, how to use them." Richard Henry Lee, 1788, Initiator of the Declaration of Independence, and member of the first Senate, which passed the Bill of Rights.