The Rapid Deployment/Light Tank was developed by AAI Corporation to meet a specification requested by the US Army in 1980. The first RDF/LT shown in the brochure was fitted with a high velocity 76mm cannon similar to the one fitted to the M-41 Walker Bulldog. The nexts version was fitted with an AAI developed cannon that fired caseless telescoping 75mm rounds that could be fired in burst and had an extreme elevation for engaging slow moving aircraft or helicopters. AAI claimed that 75mm cannon could defeat modern main battle tanks by hitting them with a five round burst in the same area of the armor. Three versions of the RDF/LT with the ultra modern full auto 75mm cannon were developed.