This is an original factory replacement part from Marlin. Factory replacement parts are manufactured to the exact same specifications and tolerances and use the same manufacturing materials as the original parts. Disassembly and assembly may be required and some parts may require installation by a qualified gunsmith. FitModel 80, 780, 20, 25, 80C, 80DL, 80EGlenfield models 20, 25, and 80GJC Higgins models 42 and 42DLForemost model 20Revelation model 105