^oh gotcha. Is the surshot the stock with the thumb hole? I'm not 100% sure but since it's a semi-auto shotgun with a pistol like grip it may not be nj legal. But I think further clarification is needed. Maybe that's why you are having a hard time finding one. I used to see the 870 surshots in gun stores.
No, it's a ambidextrous stock. It's not collapsible, so it's legal.