That's a noble goal, to stop teenage suicide. At least, stop suicide by guns. Pills, hanging, idk. It's certainly something a teen would do out of immediate opportunity.
What I find weird is they can sign up at 18 to be in the military and kill hundreds in the name of oil companies. With guns. They're obviously smart and reasonable enough to make the decision to end other people's lives. We trust their judgement enough in Afghanistan, but not at home.
I don't know that there's a perfect solution. I just know that this seems inconsistent, and the government is happy with inconsistencies as long as they benefit.