Two piece bases without visible screws?

[showgun]

Alright fellas, This has probably been covered however I'm overlooking something. This is the first rifle (110) I have owned with a 2 piece scope base. I am looking to replace them with a solid picatinny but they do not have visible screws. How do these two piece bases attach/detach?

Thanks

[thirty06]

If this is an older 110 it can have cast in bases. If it does there is no screws and what you see is what you get.

[showgun]

Thanks for the info... Looks like I'm stuck with permanent mounts. Now I have to go back to my original plan and buy a donor action. Cant complain as this older 110 was free!

Thanks again

[Blue Avenger]

they were either a cast receiver with the bases as part of the casting, would have to be machined off
or they were soldered on and could be removed with heat and drilled & tapped for new bases. they were made both ways in the 70s

[showgun]

Well I went ahead and purchased a stainless 112 action with accutrigger from Mr. Briggs. I'll adjust the 4 screw trigger and drop a scope on the 110/7mag that I was going to use as a donor action.