The bolt is also different. H&R simplified the original design, making it necessary to use a latch with a removable cam lug, which is the root of the problem for some of the H&R guns. I have read on other forums that people have replaced the H&R block with either an original or Pedersoli block in order to use the original style latch. This seems like a good idea. There is some discussion of the need for machining, but no details on needs to be done. Hence my enquiry.