A hunting 70% Recoil-reduction Adapter for the 12-gauge shotgun:

A 3” 70% recoil reduction adapter produces a backwards-sideways anti-recoil puff through the slanted holes. It is installed by the end user within 30 seconds using the supplied wrench only. It is transferible to other shotgun and is removed within 10 seconds. See the video. http://www.stealthir.com/Shotgun/index.html: The price is $195. Reseller discount is 30%. The adapter is Patent Pending.