Armed police have visited pupils at a Derbyshire school to talk about the dangers BB guns pose.
They showed 13-year-old students how difficult it is to tell the difference between a BB or replica and a firing gun and the hazards involved.
Real examples of weapons and a video called Split Second were used to illustrate this.
The short film shows an example of how a teenager was shot dead by armed officers after waving a fake gun.
On average in Derbyshire more than 80% of all firearms incidents which police are called out to involve a BB gun, air weapon or other replica.
Supt Lynn Harris said: "They are very realistic and if a member of the public sees anyone waving one around or being pointed at them in many cases it will cause them to panic and call the police.