This Marlin manufactured breech bolt assembly with style No. 6 striker knob and later variation extractor is for the Glenfield model 25 bolt action rimfire rifle with the full length extractor groove along the inner left side wall of the receiver and is in very good condition with honest wear. This bolt assembly has a left side extension that protrudes out near the front portion and fits the extractor groove mentioned. (file photo)

Note: Marlin Glenfield model 25 bolt action rimfire rifles with the following years/serial numbers have been observed with this part:

1973: 27521832

1974: 26630260

1976: 24633438, 24655014

1977: 23687531

1980: 20763954