Yeh - they're calling it an AK now, which certainly matches the amount of ammunition expended in that relatively short time in front of the courthouse and the lines of bullet-holes on the vehicles and structures struck. However, they're still insisting it was legally purchased, which I doubt strongly if it was, in fact, full auto as it appears. Time will tell.
That was the first Moscow LEO killed in the line of duty in around 110 years. Prayers for the family.
The volume of holes up the hood and windshield certainly looks like the consequence of a full auto burst. I really doubt anyone would produce a pattern like that with intentionally aimed fire.
When I heard he killed his wife AND that she worked as a janitorial employee in the courthouse, another possibility arose. It may have been a jealous husband killing his cheating wife and going after the office where the "other party" works. Choosing a violent solution wouldn't be out of character given his prior record.