It shows that the people desperately clamoring to erase the 2nd Amendment often know nothing about the weapons they want to regulate. 

The act of "gun control" has nothing to do with understanding firearms, their basic capabilities and what it means to have these tools in civilian hands.  It is far more abstract. 

For example, in the mind of a leftist (because the vast majority of leftists do not own guns nor have they ever handled one), an AR-15 is a terrifying weapon of war.  They imagine a fully automatic death machine with endless ammo tearing through crowds of people.  However, for a knowledgeable gun enthusiast, a scoped and tuned bolt action rifle chambered in a magnum cartridge and capable of shooting accurately out to 1000 yards or more might be considered far more deadly in the right hands. 

Knowledge of guns changes the nature of guns.  For leftists, who know nothing, every gun no matter how archaic is considered a threat. 

For decades it has been well known in the gun community that black powder muskets are legal to buy without a background check, and can be easily purchased online.  These devices are not considered "firearms" under federal law and thus, are not regulated by the Bureau of Alcohol, Tobacco and Firearms (ATF).  It would seem that the establishment media has just discovered this fact they are very concerned.   

The Associated Press published an article this week expounding on this profound revelation, and they are shocked that there are not more restrictions in place to track and control the spread of deadly muskets among the youth gangs of urban Chicago.  When is the ATF going to step in and get flintlocks out of black neighborhoods?    

Okay, maybe they never mentioned gangs, or Chicago, or black neighborhoods, which is telling.  As the AP notes:

"With 165 grains of black powder in the barrel, a .75-caliber Brown Bess flintlock musket like the ones the redcoats carried in 1776 can hurl a lead ball at a velocity of around 1,000 feet (305 meters) per second.  Imagine what that can do to a human body. Now, imagine that it's almost completely exempt from gun regulations. 

How can that be? Well, under federal and most state laws, many antique or replica guns aren't technically considered firearms. In most places, even convicted felons can own them..."

The AP then goes on to list the states trying to "close the loophole" on easy musket access.  Like all gun control articles the focus is on the gun rather than the criminals.  They never mention the primary source of gun crime.

The vast majority of all gun violence per capita occurs in urban areas, and largely in minority neighborhoods.  Around 50%-60% of all gun crime victims are black.  Around 50% of all gun crime suspects are black, despite black Americans representing only 13% of the US population.  And, the vast majority of these crimes are committed with handguns, not AR-15s and certainly not muskets.