We have seen a few cases where players have had trouble getting the Survivor's new light vehicle the Technical equipped with a turret. The Technical basically comes with both the Rocket Man and Burning Man turrets included; BUT the Technical's turrets are not granted to the account at level 1 automatically. You will need to research the tech before you can equip it.
Luckily, that research is free!
Once you have researched those components, you shouldn't have any trouble getting those units equipped and ready for whatever your enemies can throw at you!