// 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|BRIGHT|METAL|INVISIBLE);

    VECTOR tail, lastPos;
    while(1)
    {
        tracerglow.x = - 20; tracerglow.y = 0; tracerglow.z = 0;
        vec_rotate(tracerglow,my.pan);
        vec_for_vertex(tail,me,1); 
        effect(effect_smktrail, 1, tail,tracerglow);
        effect(effect_tracer,1,tail,tracerglow);
        vec_rotate(tracerglow,my.pan);
        //Check if still moving far enough, per frame, to call it "alive".
        vec_set(lastPos, my.x);
        wait(1);
        //this min_distance "10" is just a guess, you'll need to calculate a distance yourself
        if(vec_dist(lastPos, my.x)<10)    break;  
    }
    // kill_bullet();    dunno what "kill_bullet" is for, but I'll assume its the [no-longer-needed] 10 second timer
    phent_settype (me,NULL,NULL);
    ent_remove(me);
}



function impact_mghit()
{
    switch (event_type)
    {
    ///////////////////////////////////////////////////////////////////////////////////////////////////  	
        case EVENT_IMPACT:
            effect(effect_sandhit,5,my.x,nullvector);
            phent_clearvelocity(me);   

    ///////////////////////////////////////////////////////////////////////////////////////////////////      
        case EVENT_ENTITY:
            effect(effect_sandhit,5,my.x,nullvector);
            phent_clearvelocity(me);   

    ///////////////////////////////////////////////////////////////////////////////////////////////////    
        case EVENT_BLOCK: 
            effect(effect_sandhit,5,my.x,nullvector);
            phent_clearvelocity(me);   
    }
}