ok so i use the machine gun js. (see below) but it shoots far more than how many bullets i ask it to. i also cant seem to change how fast the fire rate is. well i can but it does nothing.

var projectile : Rigidbody;

var speed = 20;

var range = 100.0;

var fireRate = 3;

var force = 10.0;

var damage = 20;

var bulletsPerClip = 40;

var clips = 50;

var reloadTime = 4;

private var hitParticles : ParticleEmitter;

var muzzleFlash : Renderer;

private var bulletsLeft : int = 0;

private var nextFireTime = 0.0;

private var m_LastFrameShot = -1;

function Start ()

{

    hitParticles = GetComponentInChildren(ParticleEmitter);

    // We don't want to emit particles all the time, only when we hit something.

    if (hitParticles)

    hitParticles.emit = false;

    bulletsLeft = bulletsPerClip;


}

function Update()

{

    if( Input.GetButton( "Fire1" ) )

    {

        var instantiatedProjectile : Rigidbody = Instantiate( projectile, transform.position, transform.rotation );

        instantiatedProjectile.velocity =

        transform.TransformDirection( Vector3( 0, 0, speed ) );

        Physics.IgnoreCollision( instantiatedProjectile. collider, transform.root.collider );

    }

}

function LateUpdate()

{

    if (muzzleFlash)

    {

        // We shot this frame, enable the muzzle flash

        if (m_LastFrameShot == Time.frameCount)

        {

            muzzleFlash.transform.localRotation =

            Quaternion.AngleAxis(Random.Range(0, 359), Vector3.forward);

            muzzleFlash.enabled = true;

            if (audio)

            {

                if (!audio.isPlaying)

                audio.Play();

                audio.loop = true;

            }

        }

        // We didn't, disable the muzzle flash

        else

        {

            muzzleFlash.enabled = false;

            enabled = false;

            // Play sound

            if (audio)

            {

                audio.loop = false;

            }

        }

    }

}

function Fire ()

{

    if (bulletsLeft == 0)

    return;

    // If there is more than one bullet between the last and this frame

    // Reset the nextFireTime

    if (Time.time - fireRate > nextFireTime)

    nextFireTime = Time.time - Time.deltaTime;

    // Keep firing until we used up the fire time

    while( nextFireTime < Time.time && bulletsLeft != 0)

    {

        FireOneShot();

        nextFireTime += fireRate;

    }

}

function FireOneShot ()

{

    var direction = transform.TransformDirection(Vector3.forward);

    var hit : RaycastHit;

    // Did we hit anything?

    if (Physics.Raycast (transform.position, direction, hit, range))

    {

        // Apply a force to the rigidbody we hit

        if (hit.rigidbody)

        hit.rigidbody.AddForceAtPosition(force * direction, hit.point);

        // Place the particle system for spawing out of place where we hit the surface!

        // And spawn a couple of particles

        if (hitParticles)

        {

            hitParticles.transform.position = hit.point;

            hitParticles.transform.rotation =

            Quaternion.FromToRotation(Vector3.up, hit.normal);

            hitParticles.Emit();

        }

        // Send a damage message to the hit object

        hit.collider.SendMessageUpwards("ApplyDamage", damage,

        SendMessageOptions.DontRequireReceiver);

    }

    bulletsLeft--;

    // Register that we shot this frame,

    // so that the LateUpdate function enabled the muzzleflash renderer for one frame

    m_LastFrameShot = Time.frameCount;

    enabled = true;

    // Reload gun in reload Time

    if (bulletsLeft == 0)

    Reload();

}

function Reload () {

    // Wait for reload time first - then add more bullets!

    yield WaitForSeconds(reloadTime);

    // We have a clip left reload

    if (clips > 0)

    {

        clips--;

        bulletsLeft = bulletsPerClip;

    }

}

function GetBulletsLeft () {

    return bulletsLeft;

}