As we get told after every mass shooting in America, the right to bear arms is in the constitution and nobody has yet come up with a way to change the constitution, let's call it an amendment for arguments sake.
Luckily America has these already and have a history of amending existing laws enshrined in the constitution to improve the lives of its citizens with the most famous being the 2nd Amendment which allows for the owning of weapons but there have been a number including the one before that mad law which sees tens of thousands of Americans shot to death each year.
Amendment 1 made the freedom of speech a thing and the 3rd stopped soldiers from being posted in your home without your consent while the 4th Amendment meant that Americans could no longer be searched at any time for any reason without a warrant.
The 5th Amendment protects individuals from being forced to incriminate themselves in a criminal prosecution and without the 6th Americans would not be entitled to a fair trial-by-jury.
Without the 8th Amendment punishments for crimes would still be excessive, cruel and unusual and slavery would still be legal if the constitution had not been amended by the 13th which abolished it.
The 15th Amendment gave black and Hispanic people the vote, the 19th meant women could join them in the polling booth and after the 26th Amendment, US citizens over the age of 18 could also vote.
Far from not being able to do anything to end the awful and lethal gun laws in America, the mechanism is there to change it and they are called Amendments for a reason but it seems to leave things as they are and just look solemn and mumble something about 'thoughts and prayers' is the preferred way to deal with the additional 40,000 bodies with big holes in them clogging up the cemeteries each year.