Some good points have been made here:
- The AR-15 is an extremely effective defensive weapon, and it is less likely to overpenetrate structures than some other types of firearms.
- Current hysteria notwithstnding, jury simulation (and that is a very good way of gauging possible outcomes for types of trials that occur infrequently) indicate that in a jury trial, the appearance of an AR-15 or pistol grip shotgun or of some other firearms may influence jurors to view the defendant unfavorably.
The latter would not arise if the case were truly open and shut.
In a shooting within the home in most jurisdictions, the defender is
presumed to have been justified in the use of deadly force in the event of an unlawful (and sometimes forcible) entry, or of a refusal to leave.
However, such a presumption is rebuttable.
Things that can raise questions about the defender's use of deadly force can include the following:
- Some kind of existing or prior relationship between the defender or someone in the family and the person shot that might indicate motive.
- The person shot having been invited in; yes, that water heater repairman may present an imminent threat of serious harm, but his having been invited in rebuts the aformentioned presumption.
- The door having been left unlocked, raising the possibility of such an invitation.
- Contradictory or unfavorable but plausible testimony by an accomplice, an earwitness, or someone else, whether true or not.
- Other indications that the defender may have been predisposed to the violent use of force--posters, Internet postings, T-shirts, and so forth.
I'm sure there are others.
Once the case has gone to trial, the triers of fact will decide on the basis of the totality of the evidence pieced together after the fact--and on the basis of
impressions.
Will the stressed defender impress them favorably? Has anyone ever seen how nice an impression a cleaned-up and well-coached street thug can make in court? Do you really want that "black rifle" sitting there as Exhibit A during the whole proceeding?
I would choose the AR-15 over the .30-30 for reasons others have mentioned, but I do not have an AR-15. For me, it would not be a useful defensive weapon unless the alignment of the moon and the stars was such that a home invasion were to occur at such a moment that I could get to the weapon timely without leaving my spouse unprotected. I do not consider that likely.
For me, that mitigates against the choice of a long arm of any kind.
However, were I to purchase an AR type rifle, I would likely select a light colored "sporter" without rails, etc.
I would do so on the basis of Dr. Meyer's work.