This Marlin manufactured early variation buffer with .100" diameter mounting pin hole is for the Glenfield model 60 semi-auto rimfire rifle and is in very good condition with light wear and dirt smudges. (file photo)
Note: Marlin/Glenfield model 60 rimfire rifles with the following year/serial number have been observed with this part:
1974: 26360250
1975: 25311069 & 25359287
1976: 24498679 & 24500654
1978: 22436687