The Long Island body-armor mogul who once hired 50 Cent and Aerosmith to perform at his daughter’s bat mitzvah and splurged on a $100,000 belt buckle was sentenced to 17 years in prison yesterday for a pump-and-dump stock scam.

David Brooks, of Westbury, was convicted in Central Islip federal court of inflating stock prices of his military-equipment company and clearing $186 million in the process.

Brooks also has been ordered to forfeit $86 million in illegally gotten gains as well as pay a fine of $8.7 million.

The judge still must decide how much he will owe in restitution to his victims.