........................

// This is from the tank's action, and initiates the function to fire bullets
if(mouse_right){fire_turrmg();}

......................

// Function used to fire machine gun (still needs sound bug fixed)
function fire_turrmg()
{
   
   snd_stop(hnd_MGfire);
	hnd_MGfire = ent_playloop(player,snd_792MG,70);
	
	var firing_ang;
	VECTOR mg_barrel;
	vec_for_vertex(mg_barrel,player,28);
	
	 ent_create("MG_bullet.mdl",mg_barrel,mg_action);
  
   wait(-0.04);
   
   if(!mouse_right){snd_stop(hnd_MGfire);}
   
}


.................
// Action to handle machine gun bullets
action mg_action()
{
	
  wait(1);
  
   ang_for_bone(my.pan,player,"turret_bone");
  	ang_rotate(my.tilt,vector(Turr_Ang,0,0));

  c_move(me,vector(15,0,0),NULLVECTOR,IGNORE_YOU);  
  c_setminmax(my);
  
  	phent_settype(me,PH_RIGID,PH_BOX);
	phent_setmass(me,0.012,PH_SPHERE);//45kg
	phent_setfriction(me,100);
	phent_setdamping(me,2,100);

  	phent_addvellocal(my, vector(2000,0,0), nullvector);
wait(1);

  my.emask |= (ENABLE_BLOCK | ENABLE_ENTITY | ENABLE_IMPACT); 
  my.event = impact_mghit;


  set(my,POLYGON);
  set(my,BRIGHT);
  set(my,METAL);
  set(my,INVISIBLE);

var mps;

 while(1)
 {
 	
 	phent_getvelocity(my,mps,NULLVECTOR);

 	wait(1);
   tracerglow.x = - 20; tracerglow.y = 0; tracerglow.z = 0;
	vec_rotate(tracerglow,my.pan);

 	VECTOR tail;
   vec_for_vertex(tail,me,1); 
   
   effect(effect_smktrail, 1, tail,tracerglow);
	
   effect(effect_tracer,1,tail,tracerglow);
   
   vec_rotate(tracerglow,my.pan);
   
   kill_bullet();
   
  wait(1);
 	
 }

wait(1);  
	
}

.................................

// Oh, and here's the event function

function impact_mghit() 
{
  switch (event_type)
  {
///////////////////////////////////////////////////////////////////////////////////////////////////  	
    case EVENT_IMPACT:
    wait(1);
    
    VECTOR placement;
    placement.x = my.x; placement.y = my.y; placement.z = my.z;
    
    effect(effect_sandhit,5,vector(my.x,my.y,my.z),NULLVECTOR);


    wait(1);
    ent_remove(me);   

///////////////////////////////////////////////////////////////////////////////////////////////////      
    case EVENT_ENTITY:
    wait(1); 

    VECTOR placement;
    placement.x = my.x; placement.y = my.y; placement.z = my.z;
    
    effect(effect_sandhit,5,vector(my.x,my.y,my.z),NULLVECTOR);

    wait(1);
    ent_remove(me);   

///////////////////////////////////////////////////////////////////////////////////////////////////    
    case EVENT_BLOCK: 
    wait(1);

    VECTOR placement;
    placement.x = my.x; placement.y = my.y; placement.z = my.z;
    
    effect(effect_sandhit,5,vector(my.x,my.y,my.z),NULLVECTOR);

    wait(1);
    ent_remove(me);   

    
  }
} 

       ///
       //Check if still moving far enough, per frame, to call it "alive".
        vec_set(lastPos, my.x);
        wait(1);
//INSERT START
        if(c_trace(my.x, lastPos, IGNORE_ME))   //if hit something.
        {
           //COMPLETELY THEORETICAL manual event-triggering (never seen or tried before)
           if(you)    event_type = EVENT_ENTITY;    //hit an entity
           else       event_type = EVENT_BLOCK;     //hit terrain/block
           impact_mghit();                          //trigger event manually
           phent_clearvelocity(me);        //stop bullet
           vec_set(lastPos, my.x);         //make it "die" this frame
        }
//INSERT END
        if(vec_dist(lastPos, my.x)<10)    break;  
    }
    ....