Came to a similar conclusion, but with a significant difference. Think the rush to conclusions and inaccurate media reporting was responsible - like with the troop of monkeys attempting to write the great American novel, their lap tops end up covered with monkey excrement.Which makes sense from someone who played video games to mimic real life attacks. The shotgun is usually used for breaching doors, pistols for close quarters combat. The AR the go to in the vehicle for the getaway. While I do not agree with tin foil heads that the whole incident was fabricated, IMO the details were completed skewed on orders from the whitehouse to go after the evil assault rifles.
Still there is no question but that EBR are considered a primary target. It is in promoting that agenda that the monkeys fail.