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no it has a 3/8 dovetail rail
The typical Marlin 39A does not have a scope. They are drilled and tapped that one can be added.
yes for a target scope .
Yes.Most marlin model 336 rifles have been drilled and tapped for a scope mount on top of the reciever.
That gun was made by Marlin for Sears, and those holes are not factory. Someone has drilled and tapped it for (probably) a Weaver side-mount base.
nope
That is hole that has been drilled, then had a thread 'tapped' into it so you can insert a machine screw or bolt.
Shafts are drilled deep into the ground and the gas is tapped and brought to the surface.
Have it drilled and tapped by a good gunsmith.
The spindle/caliper bracket is threaded.
The Marlin 57M (22 magnum Levermatic) was made from 1959 to 1969. 66,889 of them were made. Marlin did not put serial numbers on them so it is impossible to tell exactly when one was made. The earliest production had steel (squared) receivers, then it was changed to a rounded aluminum receiver for a short time. For the the final and longest period they went back to the squared steel receiver. All of them were drilled and tapped for scopes.
if it did not come with the provision to mount a scope on it you can take it to a gunsmith and have it drilled and tapped for one.