The PUMAR WR420 is a semi-rigid boat developed as a multipurpose vessel. Its high load capacity, its hydrodynamic design and reinforced structure make the MI585 Assault the fundamental weapon of the amphibious unit.

It is fully collapsible and consists of a buoyant tube constructed of Hypalon and neoprene, which provides additional UV and is extremely resistant in hydrocarbon contaminated water. The interior floor is made up of aluminum and reinforced mirror. This vessel demonstrates great versatility, maneuverability and safety as it was designed to withstand some tough sea conditions.