WalnutMaker,
Looks like a Stock-Lock, Shoots like a Stock-Lock; Must be a Stock-Lock!!
I had three(3) Pat McCarthy Stock-Locks that you did the woodworking on. If it wasn't for the pimples on the side, your version is exactly like a Stock-Lock. It will be interesting to see if you can get a patent on "your new system". It seems to me it would be like issuing a patent on Ford pickup truck and then issuing a "new" patent for a Chevy pickup truck. I am not an attorney, but I did get a few patents in my life and I think you are pushing a snowball uphill to get a "new" patent based on what my experience has been. Good luck, I think you are going to need it along with a bunch of money. One thing you are right about is that a "Stock-Lock" type of recoil reduction system takes ALL of the bite out of trapshooting and puts the fun back into the game. I would not shoot without one.