Aspects of the present disclosure provide an armored helmet assembly that is fully or completely assembled and quickly mounted onto a host vehicle to form a military vehicle. The armored helmet assembly provides protection, weapons, cameras, and other equipment for the driver. When desired, the armored helmet assembly in a completely assembled state is unlocked and removed from the host vehicle. The host vehicle is typically a construction vehicle and useful as such. In some embodiments, a weapons platform assembly is mounted on the armored helmet assembly. Other embodiments include one or more of an expandable battle shield, a front end container for storage of equipment or weapons, and a command surveillance module. In certain embodiments, in addition to the armored helmet assembly, a lower armored assembly in a completely assembled state is mounted onto a lower portion of the host vehicle.