I would think you could just keep it if your one piece mount has 20 moa built in, or even if you just wanted to stick with 0 moa. I just took mine off and it's no big deal. You might just have to apply heat for a minute
I have the Gen 1 version with a Geissele SSA-E trigger. Had to lightly sand just a touch off the top of the hammer for it to fit. I've only shot it at 100 yds, but with 43gr Varget and 178 Amax it's easily sub moa.
These are what I used on my RPR 6.5. Just make sure you get the 5/8-24 size
https://delta3tactical.com/store/products/Gemtech-Shim-Kit-for-5%7B47%7D8%252d24-7.62mm-Flash-Hiders.html
I didn't order carbon, but a standard T4A for a Tikka CTR. I ordered it with pillars, but they took it off the order and said they didn't install them for the Tikka Stocks. I trust them.