MY 13 year old son bought a BB gun (unbeknownst to us) from his youngest step-brother, who had obtained it in a devious fashion (unbeknowst to his mother and his father…my then husband.)
The first we learned about it was when he stood on the stairs and fired one pellet into his sister’s cheek, while she was sitting at the piano, just below her eye.
We three and the gun rushed to the pediatrician, who removed the BB from my daughter’s eye. Then he threatened to notify the police about my son’s behavior. That was the last time my son ever went near any kind of firearm.
My oldest step-son shot an arrow into his youngest brother’s (the original owner of the BB gun) arm. There was serious repercussions over that incident also.
We were lucky that no one was seriously hurt. The boys never experimented with any kind of weaons ever again.