Well, you get the picture. I like front-stuffers and I dearly love simplicity. The fewer things to break, the fewer worries, just ask any of us old coots from the early days of the M-16 and Vietnam. Also love front-stuffers, and the one that has intrigued me, and evaded me, until now, has been the underhammer. Finally got my hands on not one, but two, a Hopkins & Allen Off Hand, in .45 cal, and an H&A Buggy Rifle in .36 Cal. So, now a deer gun and a squirrel gun - used, of course. Problem is, the Buggy Rifle’s rear sight went AWOL with the previous owner , and I can’t find a source for either the sight, or the dimensions to get a suitable replacement. Any ideas? Be most grateful, folks.