How Many Bump-Fire Stocks WERE at Mandalay Bay?

David Codrea‘s ATF FOIA request on bump-fire stocks has generated something that puzzles me.

The ATF FOIA dump includes this on page 36.

12 of the .223 AR-type firearms are equipped with a type of “slide-fire” or “bump-fire” device capable of simulating automatic fire (see attached photos).

That number is odd because when you go to the LVMPD Final Investigative Report you get a differing number.

14. Not 12. Somehow, LVMPD came up with two more bump-fire stocks than the ATF reported. And yet, both ATF and LVMPD came up with the same overall count: 22 AR-type (-15 and -10), 1 bolt-action, and 1 revolver; 24 total.

Of course, this isn’t the only discrepancy in weapon-type counts. The Wall Street Journal, Daily Mail, and other outlets reported that the shooter had at least one converted fully automatic rifle in addition to the bump-fire stocked firearms. Per the Daily Mail on October 3, 2017:

Clark County Sheriff Joe Lombardo said on Monday it wasn’t clear whether the full-auto gun was modified, or if it was originally made that way.

and

“…full-auto assault rifles…”

more

“At least one of those was automatic, while another two had been modified with legal bump-stock devices…”

Fast forward to the FIP of August 3, 2018, and the machineguns have disappeared from the narrative, while two extra bump-fire stocked weapons appear.

Make of it what you will. I just find it odd. And even odder, per the FOIA dump, that the ATF, responsible for NFA items like full-auto assault rifles, was not allowed to examine any of the shooter’s weapons.