Almost without exception, mass shootings occur in gun-free zones.
We already have 35,000 gun laws in the USA. Which of them is not "common sense?" How many thousands more gun laws do we need?
None of them are "common sense". All of them are unconstitutional. Not only does Article 1 not authorize the Congress to pass "gun control" laws, the Second Amendment explicitly forbids it. "Common sense" doesn't even enter the picture.