This is a sole source requirement intended for Dillon Aero, Inc., justified by avoiding substantial duplication of costs that would not be recovered through competition. It will establish a Firm Fixed Price Indefinite Delivery Indefinite Quantity contract for M134D Minigun weapon systems and associated mounting systems for air, water, and ground platforms. The contract also covers spare parts, accessories, support equipment, installation, and operator and maintainer training. The M134D variants include the lightweight hybrid (H) and corrosion-resistant marinized (M) models, both capable of firing 7.62x51mm rounds at a fixed rate of 3,000 rounds per minute. No budget amounts, performance location, or non-bid timelines are specified.