how is the shooting particle effect from Survival Shooter tutorial from official Unity Site.

Hi, sorry about the weak title, I would like to ask about the shooting particle (the guns / the bullet) from the offical tutorial Survival Shooter.
My question is about the animation of the shot bullet.
I was curiousing about the the effect, is it showed as a single round yellow shinny particle and fly over with very high speed, or, showed directly as a solid long thin cone shape with very quick blinking?

I sorry I din't really gone through that tutorial as well as I really go deep learn about the code. I just curious and wanted to know about the concept of how was it performed. Any helpful explanation are absolutely appreciated. Thanks and sorry if I posted on wrong forum page.