Thompson Mounts

[Maineiac]

I've have decided to move back to my Thompson encore for turkey. While I was away from it I fell in love with a red dot. I'd like to mount it, on the Thompson. I can see two holes pre-drilled in the barrel, but all pic rails seem to have 6 or 4 holes, are there two more under the sight I can access if I remove the sight?  Or, do I need to have it drilled/tapped for additional screws to mount the rail?  Thank you for your consideration and replies.
Maineiac

[Dazzler]

I've have decided to move back to my Thompson encore for turkey. While I was away from it I fell in love with a red dot. I'd like to mount it, on the Thompson. I can see two holes pre-drilled in the barrel, but all pic rails seem to have 6 or 4 holes, are there two more under the sight I can access if I remove the sight?  Or, do I need to have it drilled/tapped for additional screws to mount the rail?  Thank you for your consideration and replies.
Maineiac

My encore has four visible with the rear sight still installed.


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[Maineiac]

I removed the rear sight and there are four more holes under it. I think I'm good to go. Thank you for your reply!