This Marlin manufactured first variation feed throat with four raised circular studs (two on the left and two on the right) is for the early model 99M1 semi-auto rimfire rifle with the ejector as part of the left side feed throat which uses the earlier lifter spring and not the later ejector/lifter spring. This assembly is in very good condition with light wear. (file photos)

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

N.S.N.: (IL) September 1968

1973: 27309096