After a ton of research I went this route as a shotgun will never be my primary. so it will stay with a birds head grip. A breacher + weapon.
https://rifleshooter.com/?s=shockwave
https://demonstratedconcepts.com/recoil-strap/
******* Demonstrated Concepts shooting birds head grip shotguns
******* JM shooting a Shockwave and listen to what he says. He uses one for HD.
https://www.opsolmini-clip.com