Bullet Factory
From CrimeBloc Help
In order to shoot someone, you need Bullets. The Bullet Factory is the only place in the game where you can buy Bullets (except Credits). The Factory is generally player owned, so the price per Bullet is set by the owner. When it's sent with or without escrow, it sets itself to Player operated rather than crew operated, whether you're in a crew or not. Bullets can also be gained from Bonuses through Auto Theft and sometimes as a reward from ranking. There is also a chance to gain bullets in special/seasonal events when they are enabled in game.