This is a 2.75-inch caliber Mighty Mouse air-to-air rocket. Powered by a solid fuel motor, the unguided Mighty Mouse fired singly but usually in salvos at enemy aircraft from U.S. Navy and Air Force jet fighters. Helicopters also carried the Mighty Mouse. The retracted fins immediately unfolded when the rocket left its firing tube or pod. Although small and plain looking, a single Mighty Mouse could easily destroy large aircraft, such as bombers.
The Might Mouse made its debut during the Korean War and found widespread use during the Vietnam War. A typical Mighty Mouse carried a 3.5 pound warhead and could attain speeds nearing Mach 3.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.