Here is the text of the 2nd amendment.
Going strictly by what is written, restrictions on the purchase of firearms seem to be constitutional. Agree or disagree?A well regulated militia, being necessary to the security of a free state, the right of the people to keep and bear arms, shall not be infringed.
Note that I'm not asking whether they are a good idea or not, that's a separate debate. I'm only asking whether they are constitutional.