Someone on this site had scalloped the rear of the receiver a few years ago. And I am thinking there was an article in one of the magazines with it. But I wouldn't want to round the spear of the receiver. It would make it look too much like a Kreighoff or maybe an old Ithaca. The way it is, makes it look more like the Fox and I always liked that look. John Olin liked the sides on the 21. It gave an engraver a platform for engraving a dog or some type of an animal on it. Which is why he didn't want to shave the sides of the receiver. But, they eventually did, anyway.