Dude, you've really got to name your objects. My brain hurts from trying to read your events. It's all Sprite, Sprite2, Sprite3, Particles, Particles2, Particles3, and none of your sprite icons look like their sprites.
Anyway, I'm pretty sure I've got it fixed for you.
http://www.fileshack.us/get_file.php?id ... ticles.cap
I put the bullet-trails particle object into a container with the bullet, and removed (or rather, turned off) two of your events, particle spawn and particle create. I commented both. Seems to work fine now.