SMILE! Been there, done that and can only assume that the t-shirt is lost in shipping!
As for this piece of inanity, the US Constitution has a crystal clear procedure to do your wish of repealing the 2nd Amendment. The 18th Amendment (1919) was repealed by the 21st Amendment (1933) so why don't you GO FOR IT!
Like all of the other Amendments in the Bill of Rights, the Second Amendment DOES NOT grant those rights. They prohibit the government from depriving you of those enumerated Natural Rights. You really need to know that.