The Army wants thousands of new missiles to replace the venerable Stinger air defense system amid the growing threat of relatively cheap and small attack drones. Over time, the Stinger became a major part of American air defense. Now the Army wants to replace the Stinger with thousands of new missiles, which it calls the Next Generation Short Range Interceptor, to counter these types of drones. Stout air defense vehicles. Ultimately, the Army wants to replace Stingers on 248 of the vehicle-based missile defense systems.