300 blackout upper is working (video)

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thanks and thanks and thanks. its a YHM suppressor QD mount.

you can get one like it that is not a mount, i forget the name.

i couldnt tell at the time because of the ear protection but after watching i can hear the first suppressed shot louder than the next two.

those were factory subsonics too. reloads could be less loud.
 
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