Mandalay Bay Bump-Fire Stock Use

Over at David Codrea’s War On Guns, a commenter asked

[W]as there any ballistics done to see if some or any at all of his guns were used?

For the longest time, the police only acknowledged a single weapon being fired: the revolver with which the shooter was shot.

That, at long last, changed with the release of LVMPD’s final investigative report, dated August 3, 2018, which addresses what firearms were fired.

The report (which also contains many inconsistencies regarding timelines, police statements, and even placing the shooter in two different cities at the same time) is very poorly organized, making it tedious to locate and collate data. Adding to my own problems were websites purporting to link to the final report, but actually linking to the January 18, 2018 preliminary report, which did not say what weapons — except the suicide revolver — were used.

In one section of the final report, the firearms found in the suite were listed by make, model, serial number, chambering, and a brief description (to include if it were equipped with bump-fire stock). Then you have to scroll through page after page before finding a list of which weapons were fired, and how many times. To get the quantity fired, recovered bullets were presumbably matched ballistically to firearms.

The weapons-fired list does not include descriptions, and the list isn’t in quite the same order as the descriptive list, making it difficult to see if a bump-stocked weapon was fired.

I ended up making a separate copy of the descriptive list, then anotating it with the rounds fired from the second list. Those weapons highlighted in red were listed as both being equipped with bump-fire stocks and fired.

August 3, 2018 final report

Recovered in rooms 32-135 and 32-134 were 1057 shell casings. Forensic analysis was
completed on all of the shell casings that were recovered. Of the rifles recovered from inside
rooms 32-135 and 32-134, 14 were found to have been fired.

32-134 (5 guns, 3 rifles fired)

1. FNH FN15 FNCR000383
AR-15 .223/5.56 with a bump stock, vertical fore grip, and 100-round magazine. No sights or optics.
Fired 144 rounds.

2. Ruger American 695-93877
.308 caliber bolt action rifle with scope.

3. LMT LM308MWS LMS18321
AR-10 .308/7.62 with a bipod and red dot scope. No magazine.

4. Ruger SR0762 562-13026
AR-10 .308/7.62 with a bipod, scope, and 25-round magazine.
Fired 6 rounds.

5. LMT LM308MWS LMS18300
AR-10 with a bipod, scope, and 25-round magazine.
Fired 2 rounds.

32-135 (main suite, 19 weapons, 11 rifles fired, 1 handgun)

1. Colt M4 Carbine LE451984
R-15 .223/5.56 with a bump stock, vertical fore grip, and 100-round magazine. Front sight only.
Fired 100 rounds.

2. Noveske N4 B15993
AR-15 .223/5.56 with a bump stock, vertical fore grip, and 40-round magazine. EOTech optic.
Fired 33 rounds.

3. LWRC M61C 24-18648
AR-15 .223/5.56 with a bump stock, vertical fore grip, and 100-round magazine. No sights or optics.

4. POF USA P-308 UA-1600204
AR-10 .308/7.62 with a bipod, scope, and 25-round magazine.

5. Christensen Arms CA-15 CA04625
AR-15 .223 Wylde with a bump stock, vertical fore grip, and 100-round magazine. No sights or optics.
Fired 21 rounds.

6. POF USA P-15 PE-1600179
AR-15 .223/5.56 with a bump stock, vertical fore grip, and 100-round magazine. No sights or optics.
Fired 95 rounds.

7. Colt Competition CCR014544
AR-15 .223/5.56 with a bump stock, vertical fore grip, an 100-round magazine. No sights or optics.

8. Smith & Wesson 342 AirLite Ti CDZ7618
.38 caliber revolver with 4 cartridges, 1 expended cartridge case.
Fired 1 round (found in Asshole’s head).

9. LWRC M61C 5P03902
AR-15 .223/5.56 with a bump stock, vertical fore grip, and 100-round magazine. EOTech optic.
Fired 12 rounds.

10. FNH FM15 FND000905
AR-10 .308/7.62 with a bipod, scope, and 25-round magazine.

11. Daniel Defense DD5V1 DD5007426
AR-10 .308/7.62 with a bipod, scope, and 25-round magazine.

12. FNH FN15 FNB024293
AR-15 .223/5.56 with a bump stock, vertical fore grip, and 100-round magazine. EOTech optic.
Fired 153 rounds.

13. POF USA P15 03E-1603178
AR-15 .223/5.56 with a bump stock, vertical fore grip, and 100-round magazine. EOTech optic.
Fired 100 rounds.

14. Colt M4 Carbine LE564124
AR-15 .223/5.56 with a bump stock, vertical fore grip, and 100-round magazine.
Fired 96 rounds.

15. Daniel Defense M4A1 DDM4123629
AR-15 .223/5.56 with a bump stock, vertical fore grip, and 100-round magazine. EOTech optic.
Fired 95 rounds.

16. LMT Def. 2000 LMT81745
AR-15 .223/5.56 with a bump stock, vertical fore grip, and 100-round magazine. No sights or optics.
Fired 100 rounds.

17. Daniel Defense DDM4V11 DDM4078072
AR-15 .223/5.56 with a bump stock and vertical fore grip. No magazine. EOTech optic.
Fired 100 rounds

18. Sig Sauer SIG716 23D020868
AR-10 .308/7.62 with a bipod, red dot optic, and 25-round magazine.

19. Daniel Defense DD5V1 DD5008362
AR-10 .308/7.62 with a bipod and scope. No
magazine.

Interestingly, despite a scoped bolt-action rifle, spotting scope, and alleged ballistics calculations, the Ruger American .38 bolt-action was reportedly unfired.

Note that the only bump-fire stock-equipped rifles listed as fired were chambered in .223/5.56. Then listen to audio recordings of the shooting.

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