Mine has been been switched to a McMillan stockHere's another option.
Replace the rail and rings with LaRue tactical and you would be able to move your optic to other weapons as needed. From the first picture it does not appear to be a mpr. I have several christensen rifles and mine sure looks different.
Did you buy the rifle new or used. If used I would put a new rail on it. I have seekins rings on my CA with a Leupold Mark5 rail and it works perfect. Some of weaver rails are NOT spec to picatinny and are spec for “weaver style rings” only.Mine has been been switched to a McMillan stock