50-350 USD or so
Contact Marlin
The typical Marlin 39A does not have a scope. They are drilled and tapped that one can be added.
One can purchase rifle scope mounts from websites like Optics Planet, Cabelas, Amazon, Scope Mounts, Airgun Depot, eBay, Talley Manufacturing and Jmecks Scope Mounts.
Depending on the gun, yes.
Yes the receiver is grooved for scope mounts
no it has a 3/8 dovetail rail
Yes.Most marlin model 336 rifles have been drilled and tapped for a scope mount on top of the reciever.
It will require that the rifle be drilled and tapped for scope mounts. Some small rifles (usually .22 rimfire) can use a dovetail mount, but those rifles are made with the dovetail grooves, and they will not work with a heavy recoiling caliber. There are a very few scope mounts that use existing rear sight bases to mount the scope, but it will be very far forward on a T/C, and need a long eye relief scope. Your best course would be to have a smith do a professional D&T for your rifle- relatively cheap to do.
Check the scope mount makers web sites or call Remington.
These guns were never drilled/tapped for scope mounts. Like most inexpensive .22 rifles, the top of the receiver is grooved for tip-off mounts. The mounts and rings are typically one piece, and sold virtually everywhere - even WalMart.
about $140 depending on the condition
yes