The campaign, created by Miles Calcraft Briginshaw Duffy, is targeted at 13- to 19-year-olds and includes radio and TV ads that feature the views of real prisoners to drive home the campaign's "Don't blow your life away" tagline.
Researchers visited prisons and spoke with prisoners to get a real perspective on what they were missing out on most as they served their prison sentences.
The campaign was created from those conversations with Category A murderers and those serving sentences for attempted murder, robbery and possession of a firearm. It asks young people to think about the things they would miss out on if they ended up in prison after committing a gun crime.
In addition to the TV and radio ads, a replica prison cell will be toured around venues in the five boroughs of London where gun crime is most prevalent within black communities. Operation Trident is the Met's black-on-black anti-gun crime campaign.
Lee Jasper, chairman of the Trident Independent Advisory Group, said: "Too many of our youngsters have lost their lives as a result of terrible acts of mindless violence.
"This Trident campaign drives home the point that those who are convicted of gun crime could be facing a lifetime of living locked up in a box. That's locked up in jail while life goes on outside without you."
Detective Chief Superintendent Helen Ball, the head of Trident, said: "Trident is concerned that people are starting to carry guns from an increasingly young age. That is why this campaign is aimed at 13- to 19-year-olds in London, especially those living in gun crime hotspots."