I'm looking to add a bullet trail to a specific sniper rifle I'm editing (You know. Similar to bullet trails used in Halo or on the Machinma from Team Fortress 2? Especially similar to the Machinma though).

The sniper rifle I'm working on will greatly benefit from having a bullet trail so am curious how to do without necessary need to make an projectile file for it? Or am I gonna need to do a projectile file?