A laser projection insert includes a retainer and a laser module positioned in the retainer. An activation cap includes a printed circuit board and a photo transistor disposed on the printed circuit board. The photo transistor is configured to receive an optical signal from a simulative training firearm. The activation cap is configured to control the laser module to emit light. A power source is disposed between the activation cap and the laser module. A first part of the power source is positioned on the activation cap and a second part of the power source is positioned on the laser module.