I think that Sam didn't want to get his brother into more trouble so he hid the gun.  I agree with this action because I think Sam's father would have done something radical about it and Sam would be in trouble with Stick, his brother, who he looks up to.  I think that Sam should not go forward with the Black Panther nonsense.  I think to someone of the African American race, living in that time, would think that the Black Panthers hold an appealing image and that they portray themselves as heroes.  In stories the hero always has to kill or, for the younger children, "defeat" the villain, i think that kids will see them as more of a hero who has to kill a lot of villains as opposed to a villain who is killing people.  I think Sam should get out of his involvement with the Black Panthers but i would understand how it might seem like a more appealing offer than just holding demonstrations and peacefully putting a stop to the discrimination which could take a very, very long time.  It might seem like since the Black Panthers way is faster it is the better decision...