It looks very much like a REMINGTON POLICE FOLDING SHOTGUN STOCK minus the pistol grip. If you look at it from the bottom you should see 3 or 4 rather large lightening holes on a Remington stock. I believe the stock that you have bolts to the shotgun frame and the pistol grip bolts to the bottom of the stock. I don't have a Remington folding stock, so I am just guessing from pictures that I have seen.