If Jordan Davis did show a gun, then yes he has a self defense claim against that.
Nowhere in his testimony did he say the other 3 had guns, so he can't claim self defense for trying to kill them.
See how that works?
NO, I don't see that. Here's why. The prosecution also has no reliable evidence (beyond a reasonable doubt) that Dunn ever tried to shoot the other 3. We're talking about a situation where 4 people are tightly close together inside a vehicle, yet the other 3 were not hit. So why should anybody think Dunn was trying to kill them.
As a gun owner myself, I'm a bit surprised they didn't get shot just by accident, if Dunn was trying to shoot at 1 of the 4 who was holding a gun. I see no evidence to show that Dunn was trying to shoot the other 3, and to convict him of that is just assinine.