Believe it or not, the brief case in the vid has to be registered with the BAFTE as an assassination device and requires a $200 transfer tax just like a full auto machinegun.
A purdy thang and good conversation piece, but I wonder if it may have been created as a movie makers wet dream hosing down a set, vis a vis a prime assassination tool?
Machine guns or destructive devices manufactured after 1986 requires you to be a Class III dealer or law enforcement. A citizen can own a machine gun or destructive device manufactured prior to 1986 by paying for the $200 stamp. I infer they are labeling that a destructive device, as it appeared to be a semi automatic, which a citizen can own. I wonder why putting a semi automatic in a brief case would make it a destructive device and require a stamp, other than it serves no useful purpose beyond a personal protection or assassination device??
One thing for sure, firing it semi or full in a closed case would most likely end up with an extraction/feed jamb. Recoil would also be hard to control at arms length and I can only imagine if it was full auto, given that even two handed, my 20 rounds a second Mac 11 spaced the rounds about 3" apart as it climbed vertically. They get away with it in the movies because blanks have little recoil.
Shooting from a closed case would give one reliable shot before a possible jamb and consider that without a good aiming mechanism it would ostensibly be a relatively close range weapon.
That one was not, but even if suppressed with subsonic rounds, after the recoil and noise from the first shot, there would be no question of who had had the thunder stick hidden in a wildly gyrating brief case.
PS: Damn, those were righteous dabs! After posting this, I went back and watched the video again and realized it was a 22 rimfire, so not as much recoil, but with the same closed case firing issues. Though 22LR is hypersonic, it probably isn't out of that short a barrel, so may not have an associated sonic boom.
After noticing that, I considered deleting the above to save embarrassment, but decided not to as it does share some insight as to what is going on in the movies, versus real time.
