Okay.
The state system is this part, btw:
stateName[0] = "Activate";
stateTimeoutValue[0] = 0.15;
stateTransitionOnTimeout[0] = "Ready";
stateSound[0] = weaponSwitchSound;
stateName[1] = "Ready";
stateTransitionOnTriggerDown[1] = "Fire";
stateAllowImageChange[1] = true;
stateSequence[1] = "Ready";
stateName[2] = "Fire";
stateTransitionOnTimeout[2] = "Smoke";
stateTimeoutValue[2] = 0.14;
stateFire[2] = true;
stateAllowImageChange[2] = false;
stateSequence[2] = "Fire";
stateScript[2] = "onFire";
stateWaitForTimeout[2] = true;
stateEmitter[2] = gunFlashEmitter;
stateEmitterTime[2] = 0.05;
stateEmitterNode[2] = "muzzleNode";
stateSound[2] = gunShot1Sound;
stateEjectShell[2] = true;
stateName[3] = "Smoke";
stateEmitter[3] = gunSmokeEmitter;
stateEmitterTime[3] = 0.05;
stateEmitterNode[3] = "muzzleNode";
stateTimeoutValue[3] = 0.01;
stateTransitionOnTimeout[3] = "Reload";
stateName[4] = "Reload";
stateSequence[4] = "Reload";
stateTransitionOnTriggerUp[4] = "Ready";
stateSequence[4] = "Ready";
Basically what you want to modify is the last part, the "Reload".
See, it goes back to ready once you lift up the trigger, and then ready goes to fire once you put down the trigger. You need to make it keep going to fire until you lift up the trigger.