What you could also do is download another version of the bullettrail.http://fxhome.com/presets/info_cache/preset585.htmlhttp://fxhome.com/presets/info_cache/preset377.htmlhttp://fxhome.com/presets/info_cache/preset215.html
If you aren't happy with these results, you can add a muzzle flash, instead of the bullettrail.
But if you really want the bullettrail, do the following:
1- Click on the "Particle" icon.
2- Click in the rectangle beside the "search" button.
3- Write "bullettrail".
4- Click on "search".
Then you may have your bullettrail. However, if you still don't have it, try writing it differently, like "bullet trail", for example.