This Marlin manufactured first variation outer magazine tube is for the earliest of Glenfield model 60 semi-auto rimfire rifles manufactured between 1966 and 1967 and designed for the first variation front sight which mounts into a dovetail slot. This magazine tube is in very good condition with light wear and having a few specks of rust. (file photos)

Note: Firearms with the following years of manufacture and serial numbers have been observed with this part: 1966 or 1967: N.S.N.