This is a model of unknown scale of the Bullpup, a U.S. Navy and U.S. Marine Corps air-to-ground missile. Developed by Martin, it had a range of 7 miles, a 250 lb conventional warhead, and utilized radio guidance from the launch aircraft. The missile was first deployed in 1959 and was replaced by the Bullpup A in the early 1960s. Topping Models made and donated this model to NASM in 1958.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.