This Marlin manufactured second variation breech bolt Assembly is for the model 99M1 semi-auto rimfire rifle with new hold open feature and is in very good condition with light wear. This assembly consists of the second variation breech bolt, cartridge lifter roller, first or second variation firing pin, firing pin retaining pin, and the complete extractor assembly. (file photo)

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

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

1971: 71526077

1973: 27309096

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