1 Original Model 1879 Springfield .45-70 Trapdoor "Buckhorn" Sight Slide Top Plate Screw. Same for Rifle and Carbine. PLEASE NOTE: These screws are very tiny and extremely fragile. The ones I have for sale have all be removed so the slots will not be perfect. I won’t send screws that can’t be used but you must install them with extreme care to not strip or make them ugly.