The best people to ask this question is Remington. I suspect that (if the gun is a success) that Remington or one of the aftermarket companies will make a higher capacity but that is just speculation on my part. You can contact Remington at Remington Arms Company, LLC
870 Remington Drive
P.O. Box 700
Madison, NC 27025-0700
TEL: 1-800-243-9700
Fax: 1-336-548-780 or remington.com/contact-us

Hi Mike, I would confirm with Remington at Remington Arms Company, LLC 870 Remington Drive P.O. Box 700 Madison, NC 27025-0700 TEL: 1-800-243-9700 Fax: 1-336-548-780 or remington.com/contact-us

Michael, Remingtpn will likely follow suite to keep up with Mossberg Sir. Remington Customer Service may have a more specific answer at TEL: 1-800-243-9700