A measurement and data integration system for the preparation of a firearm, to fire an accurate, precise shot, incorporating a tubular component containing two sensors to measure the speed of the projectile, further including a subsystem for the detection of the impact thereof and the measurement of the time of flight of the same, a subsystem for the measurement of the angles of inclination and cant; a calibration subsystem, a subsystem for communication with weather stations which consults and receives in real time the meteorological variables, as well as a microprocessor with a first operational programme that measures, requests, stores and manages all the aforementioned signals, and a second programme that includes an interface with the user.