Everyone's saying the guy used an AR but given the relatively small number of shots and the fact that the bullets went everywhere except where the guy was presumably aiming my bet is he was a Socialist Rifle Club guy with an SKS.
No... it was an AR with no scope fired from the prone position by someone who definitely was not trained to land shots precisely at that range from that shooting position in a highly tense unsurviveable situation again all without a fucking scope
Tmz had a video of the moron opening fire and getting counter sniped
I mean... At the risk of landing on a list... Any infantry private could have landed that shot.
But if I were to do it it would be a larger round that's more resistant to the wind, capable of penetrating the light body armor the secret service wears, and from about 3 times the distance with 6x optics. There's at least a chance to E&E from that position and the likelihood of a kill shot is far higher.