Any Mossberg heatshield will in good shape any 590 barrel. I did mines the incorrect way and scratched the barrel up a couple year ago when I even now experienced the gun. You could mount the light on still left, ideal, or bottom, as you like. Detachable weaponlights might be https://remington870fieldmasterfo32198.blue-blogs.com/41992606/winchester-sxp-extreme-defender-12-gauge-for-sale-options