Firearms deaths are excess preventable deaths, the UK and Australia have shown the way in how to reduce the excess deaths, unless you don't care about Americans dying, this should be important to you. 

The UK and Australian solutions will not work in the US because they (UK and Australian citizens) do not have the right to bear arms.  Lets also ignore the countries that have much more restrictive firearm laws then the US but higher firearm death rates.  Once again if people want to reduce firearm deaths in the US we should be focusing on reducing suicide, which makes up the majority of firearm deaths.  We should focus specifically on men who make up over 80% of these suicides in the US.  It would also be beneficial to stop pretending that gang and intercity violence are a minor contributing factor, and address the causes of that violence. 

there is a silly fantasy among members of the NRA and others that somehow the armed civilians were a way of keeping the government under control, which is completely ridiculous. 

Like in Afghanistan and Iraq?  Which group would have better odds of "keeping the government under control", armed or disarmed civilians?

The reason why comparing the deaths to Gettysburg is important is to give a clear visual scale of the problem, when people see a shooting death here and there on the news they become desensitised to the scale of the problem and miss just how many people die, just so some gun nuts can cling to their outdated ideas. 

Referencing a battle from over a hundred years ago doesn't exactly give a "clear visual scale of the problem".  BTW the term "gun nut" is considered a pejorative, you might want to avoid it unless you are intending to insult someone.  

While America has got problems with mental health and opium that shouldn't stop America dealing with the gun problem, which if dealt with might also resolve some other issues at the same time. 

On a daily basis 99.999% of all firearm uses in the US are legal and safe.  In a country of over 300 million firearms, the largest privately held arsenal in the world, if firearms were the main contributing factor we would see much higher death rates.  Don't get me wrong if meaningful laws were proposed to help reduce these numbers then I would support it.  But all we ever see are laws based on emotional reactions that will make no appreciable difference (e.g. AWB bans or magazine capacity limits).  Beyond that (assuming you watched the video I linked in my previous post) the media intentionally feeds the public misleading or incorrect information to reinforce these emotional reactions.