mocking birds
Atticus mentioned this sentence in the 1st part of the book. He was teaching Jem to shoot with an air gun. After Jem learned how to use the gun, he tried to train by shooting birds. It was his initial decision and he requested for Atticus' permission to do so.At this moment, Atticus said that Jem could shoot all the bluejays that he wanted, but reminded him not to shoot any mockingbirds. He said that "it was a sin to kill a mockingbird," and his reason was that "Mockingbirds do not a thing but sing their hearts out for us, so it a sin to kill a mockingbird."Atticus
Their neighbor, Atticus Finch, teaches Jem and Scout how to shoot. He provides them with valuable guidance on gun safety and marksmanship.
Atticus, his father gives him the BB gun which leads to the famous quote: "Shoot all the Blue Jays you want, if you can hit 'em, but remember it's a sin to kill a Mocking Bird"
the reason Atticus is concerned is because then Jem will be too afraid to shoot a gun. Atticus is trying to teach Jem that courage is not a man with a gun, but someone who goes into a situation knowing that he has lost, but decides to go through it anyways.
Atticus says: Havin' a gun around's an invitation to somebody to shoot you.
Atticus allows Jem to carry a gun once a week as long as he is careful and responsible.
Atticus gives Jem a box with a single gun inside, and he gives Scout a fishing pole.
Boo Radley was guarding Atticus with a gun from the window the whole time. He emerged to protect Atticus and Jem from Bob Ewell's attack in the final scenes of "To Kill a Mockingbird."
Atticus calls sheriff Heck Tate because he knows that Heck is the only one skilled enough to shoot the mad dog safely without endangering the community. He trusts Heck's expertise with a gun and knows he can handle the situation effectively.
"'I wanted you to see what real courage is, instead of getting the idea that courage is a man with a gun in his hand.'" -Atticus, talking to Jem.
I assume you mean Jem, Atticus' son. Before Atticus shoots the 'mad dog', Jem believes his father to be quite useless in that he is too old to play sports. However, after witnessing Atticus shoot the dog, he learns several things. Firstly is the importance of modesty, secondly is that his father is not useless at all, and thirdly is that his father's traits are admirable. At the end of that chapter, Jem proclaims that he is a gentlemen, just like Atticus. He learns to look up to and respect his dad.
Boo Radley was the one guarding Atticus with a gun from his window the whole time in "To Kill a Mockingbird." Boo Radley saved Scout and Jem from Bob Ewell's attack, ultimately protecting them and their father Atticus.