Ken, you'd have a heck of a time finding one. The vast majority of the Miroku sxs I've seen have been extractor guns. Pretty basic but well-made and reliable. I've seen a couple Miroku sidelocks as well--essentially the same gun as the Browning BSS Sidelock. But one of those was definitely an extractor gun and the other may have been too, don't recall for sure. Most of the boxlocks I've seen have also had the PG/BT combination. The 12ga Model M I had was exactly like Anton's, straight and splinter (but no ejectors)--looked just like a basic Birmingham game gun. But I have never seen a 20ga in that configuration.
