This looks like a footage from the 21st Hooha Show as BOLT Airsoft also has a booth there. They show a prototype of their AKS74UN with BRSS, which will be the third rifle type that they will install their system on after the AR and MP5 series... "BOLT Airsoft introduces a prototype sample of the AKS-74UN B.R.S.S. (Bolt Recoil Shock System)."