The Hummer Mk IV is a light utility truck that is designed for security operations and military operations. The Mk IV is the latest in the series of High Mobility Multi-purpose Wheeled Vehicles (HMMWV). The baseline version seats four, and uses diesel fuel. This gives the vehicle impressive load carrying capability. The doors have adjustable windows, and has a mount for a radio between the drivers and front passengers seat. The vehicle is full off road capable, and still can go anywhere where most trucks can't go. The M3890 has a ring mount that mounts a pintle mount for a heavy weapon. The ring mount can rotate 360º, and a hatch is installed to allow access and to cover the crew area when not in use. Additionally, the vehicle mounts an Autonav 4 for efficient location and mounting points for Ablative Armor if required. However, the design of the vehicle allows for many versions: