Taking a small caliber automatic gun as the research object,a new type of friction damping buffer is proposed to analyze the recoil force of the gun body under different firing rates and parameters of the friction damping buffer. A rigid-flexible coupling dynamic model of low recoil launching of the small caliber automatic gun is established and simulated,and the gun body motion laws of four different firing rates and three different parameters of the friction damping buffer are compared. The simulation res...