The shooter didn't use an AR15. It was a Sig Sauer MCX.
great observation faithful, matter of fact pbs news with judy woodward retracted the news report of the shooter using an
ar-15, apologized for the error about type of rifle. and clarified it was indeed a sig- sauer military rifle. it was as you stated a sig-sauer military rifle, funny how all media broadcast it was a ar-15.
don't they ever check the news reports, before reporting them?
you had the right information, to bad the major media didn't.