Short Answer 
To use the Mobile Operations Center (MOC) in the game, first purchase and customize it from Warstock Cache & Carry, ensuring you select the Vehicle Workshop module. Next, gather vehicles to modify, such as the Oppressor and Weaponized Tampa, and then drive them into the MOC to access the customization menu for modifications based on your preferences and game requirements.
Step 1: Acquire the Mobile Operations Center
To start using the Mobile Operations Center (MOC), you first need to purchase and customize it from Warstock Cache & Carry. This trailer is crucial as it serves as your command center for operations. Make sure to select a suitable color and design that fits your style. Don’t forget to choose the Vehicle Workshop module to enable vehicle customization features.
Step 2: Prepare to Customize Your Vehicles
After securing your MOC, you’ll want to gather the vehicles you wish to modify. Some notable options include:
- Oppressor: A rocket-powered motorcycle.
- Weaponized Tampa: A muscle car with machine guns.
- APC: An armored personnel carrier.
- Half-track: A military vehicle with anti-aircraft capabilities.
- Vigilante: A Batmobile-inspired car.
- Insurgent Pick-Up Custom: An off-road vehicle with machine gun upgrades.
- Technical Custom: A pick-up truck with a turret.
- Anti-Aircraft Trailer: A trailer with anti-aircraft weaponry.
- Nightshark: A heavily armored off-road vehicle.
Ensure that your MOC is equipped for the modifications you plan to make.
Step 3: Modifying Your Vehicle
To modify a vehicle at the MOC, drive it into the back of the trailer. Access the customization menu by pressing the relevant button (e.g., right D-pad for consoles). From there, you can customize the vehicle based on your preferences and budget. Be aware that some modifications may require completing missions or achieving certain game ranks to unlock.