Animation on gun sometimes skips?

so i have a pistol script and i mad it so when the bullet is fired the animation plays. but if i shoot to fast, the animation won't play. even if i make the animation on .02 seconds long and the fire rate for my pistol .5, (their is so much time for the animation to reset) it still doesn't play if i rapidly shoot as fast as possible with my mouse button. i have tried both CrossFade and play, that doesn't makea difference.