This custom cover is machined from 7075-T6 aluminum, one of the strongest of all commercial aluminum alloys, stronger than many types of mild steel and stainless steels only much lighter. It fits the current Crosman & Benjamin pistol trigger frames that have three mounting screws for the cover. This includes models 1377C, 1322C, PC77, P1377, P1322, 2289G Backpacker, 2240, 2250, 2300T, 2300S, 2300KT, 2400KT, 1701P, 1720T, Marauder Pistol and all other models that use the same trigger frame cover Crosman part number 1322B044. It will not replace the older die-cast metal covers that only have two mounting screws 1322A044.