The Firearm Blog and Soldier Systems have more info regarding this new suppressor
The Firearm Blog
http://www.thefirearmblog.com/blog/2014/07/22/video-silencercos-new-shotgun-suppressor/
http://www.thefirearmblog.com/blog/2014/07/23/silencerco-6-shotgun-suppressor-video-qa/
Soldier Systems
http://soldiersystems.net/2014/07/22/additional-information-salvo-12-shotgun-suppressor-silencerco/