Hickey's Colt Armalite AR15 01 we now know didn’t have a BURST mode, it had an AUTO mode. And we can be fairly certain that agent Hickey accidentally fired an auto burst of at least 4 shots, probably 5, possibly 6. Here is my 6-shot scenario & timeline. The AR15 01 probly fired at 400 rpm. Shot-6 is the last shot, the JFK headshot (at Zapruder frame Z313). The remnant slug exits & cracks the windshield just left of the mirror. Anyhow, whether JFK was hit by Shot-6 or Shot-5 or Shot-4, it was the last shot that hit him - as the AR15 was falling - ie as agent Hickey was falling forward. Hickey was in the process of standing up to turn around to find a target near the TSBD, when the Queen Mary (the followup limo) braked, Hickey falling forward onto O'Donnell sitting in the jumpseat. Shot-5 puts a dent in the chrome trim above & right of the mirror. Fragments dent the back of the mirror. Shot-4 goes over the windshield & hits the tarmac of Elm St. Shot-3 goes over the windshield & hits the concrete curb. Shot-2 goes over the windshield & hits grass. Shot-1 goes over the windshield & hits the tarmac of Main St & ricochets onto the curb 23'4" from the pier, near Tague. Tague's left cheek is stung & bloodied by a fragment of lead from Shot-1. The 52 grain deformed remnant of what is probly the 55 grain slug from shot-1 or one of the later shots is found buried on top of the triple underpass by Lester using a detector in 1974.
