The Pansarvärnsrobotbandvagn 551 (Pvrbv 551) is a tank-hunter mounting an Improved TOW anti-tank guided missile system. The Pvrbv 551 is converted from the old Infanterikanonvagn 102/103 self-propelled guns. A new superstructure has been built on the old chassis with a new engine and transmission installed. The vehicle is operated by a crew of four, a commander and driver seated at the front, while the gunner and loader are located in the middle of the hull under two large roof hatches.