According to my T/C catalog fiber optic sight # 7732, rear sight for Black Diamond. Rear sight # 7742 for New Englander. So they are different. As far as the front sight on a White Mountain Carbine, T/C uses the same front sight for all traditional caplocks with an octagonal barrel, and round barrels with a dovetail. (Not for Black Mountain Magnum) Sight # 7748 (Fiber Optic)