I have a source for a Benelli M4 with the collapsable stock and factory 2 shell mag extension. For the life of me, I am trying to determine if this thing would be 922r legal. Every thing I read says that it is not.

The reason I am looking at purchasing this shotgun is for games. That, and I figure it may have some collection value down the road. I can get one that is decked out, but I don't want to be at odds with the ATF. Putting my 2nd amendment rights in jepoardy over a cosmetic stock is not a smart idea.

Also, would registering the M4 allow me to bypass 922r?

Hopefully I can get a quick reply as the gun will not last long. If I don't move on it, he'll sell it to someone else.