Now that it’s arrived, I see what you mean. Super easy. Thanks for the advice fellas.
Oh, and for the record, this is the most badass shotgun I’ve over owned. As soon as I opened the case, I heard the wailing and gnashing of teeth from every fudd within a hundred miles!
Rather than a piece of dowel I suggest a rectangular wooden insert that loosely fits inside the mag spring so the spring is free to compress around it. The dowel is fine for narrower pistol mags (I have them in a few of my own mags) but considering the much larger inside dimensions of a 12 ga. shotgun mag a dowel is going to flop around and possibly hang up on the spring. If you have a power mitre saw cutting an insert to fit will be very simple.
As for "permanently plugged" I don't know how to interpret that. Virtually every shotgun plug I've ever seen is removable.


















































