Absolutely it will influence the outcome of any legal proceedings, the question is to what extent. Remember, you have 3 fights to survive:
1. The actual fight: how much better is an 'assault weapon' at deterring/stopping a home invasion than a similarly chambered 'hunting' rifle or- better- a shotgun?
2. (possible) Criminal trial: yes, I know. It shouldn't matter a wit if you ended your robber's life with an AR-15 or if you used your grandfather's Parker...but can you honestly look at the newspapers or TV these days and say with certainty that it won't? What if the judge and/or prosecutor in your area is an elected official (most are), is facing reelection and needs to assure his left-wing constituents that he is anti-gun? What about the jury? These are 12 people too stupid to avoid jury duty. How many of them are soccer moms? Still feel comfortable? I don't.
3. (possible) Civil trial: cut to the courtroom: the same brain-dead cattle are in the jury box, but the best shyster attorney is representing the dearly departed's family, and they want all of your money for daring to defend yourself. How comfortable do you feel now?
I knwo its wrong, I know its silly, but it's reality. You have 3 fights to survive...you gotta survive the first to get to the other 2, I agree...but the other two are very very real and you aren't much good to your family if you kill the intruder but lose your house and possessions doing it.
It can happen- it *has* happened, I assure you. Don't think so? well...you prepare yourself to survive the worst-case scenario in fight #1...why not in fights 2 and 3?
Do the job with the most PC weapon you have that will still reliably do the job.
Mike
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"A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects." -Robert Heinlein