re: Was it ever confirmed he actually used the bump stock?

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Out of his arsenal only one gun had the bump stock (based on photos) and no confirmation if it was used yet bump stocks are now the boogeyman.

Reports were saying it looked like he used modified weapons meaning he modded the lower receiver somehow to simulate a fully auto weapon.

It's just amazing how quickly everyone has jumped on the bump stock bandwagon when we really have no clue as of now what was used.

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There is a video on youtube that you can watch that measures the duration of the automatic gunfire, (I linked it in another thread) it lasts around 11-12 seconds. The weapons visible in the hotel room pictures shows one that appears to be a bump stock equipped AR-15 type rifle. That weapon has a long stick magazine, not sure the capacity but it would have to be at least 100 rounds to shoot for over 8 seconds. The gun dude that put the video up says it would have to be a belt feed or maybe a large drum type magazine to shoot for 10 or more seconds.