You also should stop treating Zimmerman as though he were an actual law enforcement officer. I have no doubt that an actual officer is sensitive about his weapon, just as I have no doubt Zimmerman was acutely aware of where his weapon was located. Just because he had a license to carry a weapon does not mean he was a full-fledged law officer. And we are still only left with Zimmerman's version of events, and one of the biggest problems comes from your continued insistence that his story is the absolute truth for whatever reason you have for believing him. We all can see that Zimmerman distorted many facts to make himself the victim.
And yes, the physical evidence refutes his claims of a vicious attack, no matter your belief that it does not. Somehow Martin slammed Zimmerman's head into the pavement multiple times without touching him? It is not believable. Just as it is not believable that he simply left his vehicle to find a street sign of a street he has been the de facto watchman of for several years, even though he admits to pursuing Martin on foot at one point. So either he got out of his vehicle and was ambushed, or he pursued Martin and ended up in a fight. The two stories are mutually exclusive but yet both were told by Zimmerman at one time. Thankfully for Zimmerman, he was not on trial for truth-telling or he would be in prison for sure for all the lies and distortions he has told in this case.
I am not treating or crediting Zimmerman for anything, I am simply looking at the established facts of the case, unlike you, I am looking at ALL of them. It is also extremely obvious that you and weapons and violence do not have even a passing acquaintance.
Martin had a right to self defense if, and only if, Zimmerman initiated violence with him. I have said it before, and I will say it again, there is exactly ZERO unambiguous evidence that this occurred. Even the prosecution did not really try to establish that theory otherwise he would have filed an assault charge as well. There are many theories as to why they did not try this, very bad evidence (even worse than their evidence for murder) is one, though my personal opinion is that it would have opened Martin's history to being introduced into evidence and that would have completely torpedoed the prosecution. Regardless, they did not, so Martin acting is self defense from aggression by Zimmerman was not ANY real element of the prosecution's case. This is why there was so much emphasis on the how of the altercation instead of the why.