Michael, I would contact MDT who makes magazines for many brand rifles : https://mdttac.com/us_en/blog/post/mdt-releases-10-round-308-metal-magazine/

Michael - none available for the Patriot as far as I can find. Mossberg designed this as a low cost hunting rifle, and for that purpose the five round capacity was deemed sufficient. As it isn't really a 'plinker' or a 'defense' oriented rifle, I doubt the mag manufacturers are standing in line to invent a 10 round magazine for this rifle. mossberg.com/store/mossberg-patriot-bolt-action-centerfire-magazine-standard-short-action-95347.html