Richard, unfortunately as others have stated due to the design of a semi automatic shotgun a standard pistol grip wouldn't work because of the spring/tube is in the stock. You might be able to do a birds head pistol grip but finding one to fit would be extremely difficult. Sorry but hope this helps

Hi Richard, a pump shotgun, yes since it does not have part of the action mechanisms in the stock. A semi-auto has part of the action mechanisms that go into part of the stock so it is not feasible to add a pistol grip. The closest you could get would be this example : budsgunshop.com/product_info.php/products_id/139331/rocki+vrf14+vrf14+5rd+firearm

sorry Richard as a Semi auto shotgun it cant have a true pistol grip as the main spring tube extends down the stock https://issuu.com/eaacorp/docs/updated_girsan_mc312?e=16930521/66484460 page 24