Joel, best to contact Rock Island Armory / Armscor and see what the compatibility specification may be or if they have a recommendation for your specific model shotgun at Phone: (775) 537-1444. Cheers and stay safe!

Most likely no. There are many different models of RIA shotguns. Not sure which you have but the most common RIA are AR style shotguns.
Even if you have Rock Island Armory’s M5 pump-action shotgun its neither. The M5 is actually based on the underrated, now obsolete High Standard Manufacturing Flite-King pump-action shotguns. High Standard used to market its shotguns as the “world’s fastest firing pump-action shotguns.”
So you'd have to find a stock specific to your model

Joel, rock island armory makes several shotguns. So can't really give a definite answer without the model. If you post again with the model number, upc or even just the model we can give a more definite answer. Sorry but hope this helps.