So the colonists had the weapons of war, muskets, in their homes and they waged war against the British with them.
The weapons of war today are not muskets.

The thrust of the second amendment was for citizens to have the weapons of war so they could be used to protect the "free state", not to protect the citizen from would be criminals.
There is no specific constitutional rite of self defense. So, it is not your second amendment rite to protect you and your family from other citizens that you as an individual perceive as a threat, real or otherwise.
The weapons of war, hand grenades, cannons, tomhawk missiles, etc are no longer .availajble to Joe citizen. Back in the late 1700's when they were, they were to be used in wars by "well trained militia"'s that were declared by the US

Fast forward to today and most gun owners are not members of any militias and they have never given it a thought to find and join one and Congress has not declared a war in over 75 years

The second amendment is being abused by the gun manufactures very powerful lobby , the NRA, to convince anybody that can walk up to a counter and buy one that they need one and they are in imminent danger if they don't have one.

the NRA is intent on convincing these people that they can use these WalMart and Cabela "weapons" to wage war against another nation or even this one. Remember the Polish Army against the blitzkrieg of Hitler?
I hope you notice that any citizen who arms himself to take the law into his own hands or to challenge the inequities in this society is usually quickly and mercilessly guned down.

If a cop thinks you have a gun, your life is also in danger. The threat escalates exponentially the blacker that you are. 
To supply anyone who wants it and can afford it with deadly force was not the purpose behind .the 2nd Amendment.

Bearing arms is not a political ideology , either.   The right has hijacked  the 2nd amendment and labeled it as "conservative", as if they alone are the gatekeepers of the Constitution.    The NRA has programmed a substantial number of its members to believe that the 2nd amendment is under attack and only their dollar donations and purchases of firearms will save it.  The 2nd amendment was fine before the NRA and there is empirical evidence to indicate that they have artificially generated fear and suspicion and placed the 2nd under attack to increase gun and ammo sales to the delight of  the shareholders  who own stocks in gun manufacturers.   There is nothing conservative with the idea to arm all of us to protect us from each other.  In fact, that sounds like a very liberal interpretation of the constitution.

It is my experience that the pseudo scholars of the Constitution who can recite word for word the 2nd Amendment cannot tell me what the 1st and 3rd say or even name their congressmen and senators.  But they know they have to wear camouflage and  vote Republican.  They know they have to stop Hilary and Obama or Pelosi/  They know they need to be naive and never question the GOP catechism. Common sense and science are to be avoided at all costs and anybody who makes sense or quotes science is the enemy They are ever alert and armed to be on guard for the latest bogeyman that the right wing think tanks invent for the feeble minds of these sheeple.  

The GOP and their partners in blood, the NRA have got these sheeple right where they want them.  Its not a good place, but its there place and like a caged and rabid dog. they will attack anything that gets near it.  Things like reason, science, common sense and fair play have no place there.  Ignorance is bliss.