Systems and methods of integrating weapons systems with the aircraft systems of an aircraft carrying the weapon so as to generate on the aircraft in flight a display indicative of the weapon successfully engaging a target are disclosed. The system can include a ground station for generating a database describing the weapon performance envelope, a generator for creating coefficients characteristic of that performance envelope using a generic algorithm and an uploader for uploading the coefficients to the aircraft, and a reconstructor on the aircraft containing the same generic algorithm and adapted to select the coefficients for the algorithm according to the aircraft and target conditions in order to generate the feasibility display, wherein the algorithm is generic to both air to ground and air to air weapons.