DD had a pirate set with a really old fashion pistol, swords, bow and arrow, water pistols and lightsabers.
I know she played with nerf guns at a friend's house.
She had strict rules about only using certain ones outside, never to point to people or animals and if having a sword fight with friends there were rules how and where to hit.
When she was 11 she learned to shoot with an air rifle as part of her Scouting. They have strict rules about it and she was taught by qualified teachers. She attended a shooting competition twice, the second time also firing a small bore rifle.
For me swords (fencing) and shooting are sport disciplines, archery as well, there are less international rules though.
The danger is not with a toy gun, the danger is wrong play with a toy gun. DD goes paintballing in 2 weeks and plans laser shoot with a friend soon. None of them are violent teens. If DD had shown any signs of not. taking it seriously then we wouldn't have allowed any of this.