Jamaica has had a near-total civilian gun ban since 1974. Possession of even a single round can result in a lifetime in prison. The laws are harsh and rigidly enforced.
Here's how well they work. A story datelined today: Gunfire, Fire Bombs In Barricaded Slum. The headline is, if anything, an understatement. It's an AP (spit) piece, so I shan't quote from it; worth reading, despite the source. You can track the history back and it's the same story, over and over: Dave Kopel, a decade ago; the reminiscences of a daughter of privilege, from around the start of the ban. --It's the same story, that is, except it's worse every time.
At the bottom of a hole, Jamaica just keeps digging.
7 months ago