I currently have a Mosin-Nagant Universal Side Mounting Rail Installed onto the receiver of my mosin nagant. I don't like how high my optic sits. Can I buy another lower side rail and fit it to the same holes on my receiver Would the MOLOT SKS/Mosin-Nagant Original Rail or the SKS, Mosin-Nagant, Other Rifle Side Mounting Rail work? Would I have to find another area to drill additional holes to make those fit?
The only one that would change the position of the optic height would be the Molot side rail but the hole spacing is different than what you have. If you do not have a one-piece optic and mount, a different mount might be the answer to your problem.