4h 17min, jan 1, 1791 y - The Bill of rights was introduced which added the 2nd amentment
Description:
The 2nd Amendment -- "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." gains its final adjustments and is introduced.
Added to timeline:
Timeline of guns in the US
Date: