Accepted
You were in the right here, as if you were to actively attempt to restrain another person while they have a weapon out (whether it be Gun or Melee) it would be considered breaking FearRP. (However, in the future it might be smarter to try and talk to the guy before opening fire)
To have your warn removed, go to the "Bans" Section at the top of the forums, navigate to your profile, find the warning for this appeal, and for the reason on the appeal, link this post.