This is an injection-plastic military vehicle model kit.
From the manufacturer:
The FV 622 Stalwart, informally known by servicemen as the Stolly, is a highly mobile amphibious military truck built by Alvis that served with the British Army from 1966 until the 1980s. The Stalwart was a private venture by Alvis that was adopted and entered service with the British Army in 1966 as a general transport truck in preference to the FV431. It was one of the same line of vehicles that included the Alvis Saracen, Saladin and Salamander. The high mobility and amphibious capabilities were considered ideal for resupplying units in the field, particularly those of the BAOR.
- [Includes]: Rubber tires