This Marlin manufactured trigger guard assembly void of the bolt release slot is for the model 60 semi-auto rimfire rifle manufactured in 1982 through mid 1984 with the wide back extension behind the trigger guard but void of the hole for the bolt release slot which started some time during 1984. This assembly is in near excellent condition and consists of the synthetic trigger guard, serrated trigger, trigger spring, both trigger pins, and the safety assembly.  (file photo)

Note: Firearms with the following years of manufacture and serial numbers have been observed with this part:

1982:

1983:

1984: 16359195 & 16368581