Forgive the necro, this thread comes up as the #1 or #2 search result when looking for "Tikka CTR Rail Removal." I made the mistake of tightening my mirage shield screw and bent the rail. For anyone that made the same mistake, please see what I did below to remove the rail.
Read a lot of different approaches that seemed very complicated. I know a lot of people used heat (whether through a heat gun, torch or long application of a clothing iron), but I was able to break the epoxy with a plastic wedge and much less force than others used (e.g., with a hammer and a 2x4 or rubber mallet). I was also able to do this without removing the barreled action from the stock and without a vise.
2024 Tikka CTR 308.
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1. This is what it looks like when you tighten the wrong screw.
2. Back out the screw as fast as you can. This will minimize the bending. Then, remove the other screws.
3. Do this step slowly. Put the front most screw back in (the one that ****** the rail) and wait 5 seconds per turn once you feel resistance. Do not screw it in quickly or you'll just permanently bend the rail more. The idea here is to use the rigidity of the rail to force up the epoxy in the front little by little. If you didn't bend the rail badly, you will hear one or two "pop" sounds as the epoxy breaks in the front.
4. If step 3 works out, you'll see a very (very very) thin light gap in the first 2 or 3 inches of the rail.
5. Use a plastic chisel/scraper like the one below. I had one in my garage but you can buy any number of them on Amazon (get the ones that are high hardness hard nylon).
6. Fit the tip of the plastic chisel underneath the gap while the front (mirage) screw is still propping up the front of the rail, remove the screw, and hit it with your palm in a snapping motion (like a 4/10 strength)...it should separate (most if not all of) the epoxy and then you can use the plastic chisel again in the middle of the rail (perpendicular).
***Remember that the CTR has 2 plugs so you can't spin it. It needs to be pulled off straight up.
