It used to be sold with both a 4-round extension and a pistol grip; during the dark days of the Clinton AWB, the pistol-grip versions came with 2-round extensions; the word is that the shotgun could have either the 4-round magazine extension or the pistol grip - not both.
AWB is gone, but I've seen a lot of posts referencing 922(r) - with lists of parts - for making "compliant" AKs, FALs, etc., but have never seen anything referencing shotguns.
So . . . is the "only one evil feature" law pertaining to the M1S90 still in effect - or not?
