Stop animation after played 30 times?

I have recently modelled an M16 Carbine texture rigged and animated it in blender and then imported it into unity and wrote a simple script which plays its animations when certain keys are pressed. I also have a script attached to a cube in front of my gun which when the LMB is held down shoots raycasts. All of this works perfectly apart from one thing, when I hold down the LMB the cube in front of my gun runs out of ammo and you need to reload but my guns shoot animation still plays, how would I go about stopping my gun from shooting when my gun has ran out of ammo?