Huh I missed this thread previously
Daniel Defense Mk12
I've replaced the DD buttstock with a Magpul, changed the trigger to a Geissele SDM, and changed the flash hider to a PWS triad. Completely reliable and easy to shoot. So far not a tack driver, but is getting a little better. I've bought some ASC mags and plan to try some 75gr Amax at 2.31 OAL.
I've also got a build started with a Noveske 18" SPR contour, mid-length, so it should be interesting to see how the comparison plays out.
And if I decide they are too heavy, there is always a 6920...