No one counted them, so there are no numbers.
No inventory numbers
Over 200 mil.
All of them. Texas does not license firearms. As is the case with MOST US states
in 1776
There are no exact records, since there is no national registry of ordinary firearms. It is ESTIMATED that about 310 million firearms are privately owned in the US.
3.47 million people
The US did not have a president before 1789, let alone 1776. There was no country state with a president before 1776. Many places were instead ruled by monarchs.
around 300,000
Assuming you mean Firearms Retailers in the US- as of 10 Jan 2013, there are 58,725 businesses licensed to sell firearms to the general public. Many of them, such as chain stores, will have multiple locations.
Being an object with no life of it's own, firearms themselves have done nothing to us. However, PEOPLE have done many things- good and bad- with firearms. Also cars, computers, and baseball bats.
In 1776, firearms were powerful weapons. These were black gunpowder musket rifles and hand guns. Cannons were developing into larger and more powerful weapons of war.
July 4, 1776. However, many historians believe the true date was August 2, 1776.