I did it on a 308 FCP-K like 5 years ago and I had to open up the aluminum channel of the accustock so the AM DBM would fit. Not to mention the re-seller of the DMB sent the wrong spacing one. He sent me 4.25" instead of 4.4" so I had to get crafty in a drill press to mill the extra bit.
I'm not sure about the newer accustocks and the new production AM aics DBM. Chances are pretty good it will fit straight in, but not guaranteed.
Hope someone else chimes in with their more recent experience.
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