The TRS system is a drop-in recoil system for semi-automatic and automatic firearms. The TRS system allows realistic training with handguns and rifles. The system utilizes compressed CO2 to simulate recoil by acting on the gun’s bolt or slide to “cycle” the gun. An integrated laser device is also incorporated and may be used to activate special targets or simulator screens. Each “shot” is initiated by the strike of the unmodified hammer or firing pin – producing both recoil and a laser pulse. Using compressed gas instead of ammo provides the opportunity to fire a large number of simulated rounds at a fraction of the cost of live rounds!