I just read a thread below about hunting migratory birds with multiple firearms but I have a slightly different question. Is it legal to hunt migratory game birds with a detachable magazine shotgun? The regs appear to not have addressed this one way or the other. The mag limit must be achieved by means that requires the user to disassemble the firearm to remove the magazine plug. But I have riveted some of my Grizzly Mag magazines to two rounds. Is that an acceptable plug? BTW, I'm running a 28" Remington rem-choke barrel on the Grizzly. I'm not enough of a noob to try shoot snow geese with a 12.5" barrel.