Cowboys1062, I welcome your comments. I have a 1" straight breech plug and tang from The Hawken Shop, I think, and don't know what it is appropriate for. I like the Bridger and Carson rifles, and they have slanted tangs. Also, their entry pipes are screwed from the inside, there is no pin. An S. Hawken in the Nelson museum in Cheyenne has the entry pipe pinned, but the Robidoux Hawken in Lincoln, NE has the entry pipe fastened with a screw. My photos of these rifles are on this forum.