The original design had huge, big, blade ears to hold and protect the rear sight (a peep). Ground off, the rear ring is ALOT lower than the front. I suspect that if you go to the factorys, since this gun has not been in wide distribution lately, they will have a rear base to fit, made to the right height on the shelf. Just not made recently. You just won't find it in local stores. Grinding off was a very standard treatment. One, don't recall, had a hole under the spring..."the bird bath..." Great gun. Beware the Eddystones. luck
