This Marlin manufactured early variation outer magazine tube is for the model 99 M1 semi-auto rimfire rifle manufactured before June of 1975 and is in very good condition with light wear. (file photos)

Note: The latest 1975 manufactured model 99 M1 rifle we have found using the early variation inner and outer magazine tubes was serial #25313219

NOTE: Firearms with the following year/serial number have been observed with this part:

N.S.N - (KH) November 1964, (IL) September 1968

1971: 71526077

1973: 27309096

1974: 26445526