These are genuine Crosman pistol trigger group parts. The frame and cover are the current version that have three mounting screw holes for the cover, they can be used to replace older trigger frames. These parts fit all variants of the 1377, 1322, PC77, 2289G Backpacker, 1740, 2240, 2250, 2300T, 2300S, 1300KT, 2300KT, 2400KT and some related models that use the same trigger frame MPN 1322B051. The frame and cover fit Marauder pistols. Screws for the cover and frame are listed in the STANDARD CROSMAN SCREWS and UPGRADE PARTS sections. Sear and trigger pins are listed in the UPGRADE PARTS section. These parts are new from the Crosman factory or removed from a new gun.
The frame cover is made of plastic. I sell a custom version made of aluminum in the CUSTOM PARTS section along with a custom trigger and sear.