Seen these for the first time at a local military surplus and was impressed.
Just ordered a pack of 6 for $20 on ebay.
here is a couple vids
will post my thoughts after playing with them.
https://youtu.be/RdpC4uOQmaA
https://youtu.be/JyuN2ht6Kx4
https://youtu.be/3lUSEJRFbvQ