I searched on youtube asked other modders on twitter and looked at the kuda .bulletfile I wasn't able to figure it out on myself tho so I would really appreciate it if someone on here could help me 

Here's a picture of what I mean:

Go into the weapon file and search "tracer." That's the bullet trails. I'm pretty we only have access to smg trails at the moment, so just type "smg" for the tracer type, "smg_enemy" for enemy tracer type, and "smg_uw" for underwater tracer type.

THANK YOU! Finally this shit bothered me way too hard.

Keep in mind you can use the Image tags to properly include images in a forum post, which can be found amid the formatting options. It makes it a lot more convenient for other members of the community to assist you