There were plug screws in the receiver scope mounting holes. I suually use them, although Brownells sells a plug screw that I believe looks a bit better. They have a thinner head and a shorter threaded section to seal the hole a bit better. Plug screws are available from Brownells but you should be able to get them from your local gunshop or gunsmith. They mount scopes regularly and these plugs come out of the receiver holes.
