"IF Hinkley went to purchase a gun with the Brady act in effect, they would have tested him again, to see if he was mentally fit OR unfit to purchase his gun."

That's not how the Brady Act works. There's no re-testing. If you've been adjudicated unfit, you go on the list of those prohibited to purchase. Hinkley wouldn't have been on the list, because a diagnosis of depression doesn't meet the criteria for prohibition. That's just a fact.

"The rest of your garbage post is explained by me in this post. The Brady Act WOULD have been a factor in the Reagan assassination attempt."

"Explanations" (to have any value) have to based on facts. You don't have any. You lose again.