I've seen this posted more than a few times, especially whenever the subject of the Colt 6920 comes up. Rather than hijack all these other threads, I thought I'd post seperately and see what exactly the guys who say this would build. Often there are posts relating to sight radius/gas system length and/or barrel profile, and those deviations are acceptable. In this case, however, I think certain criteria are non-negotiable:
F-marked FSB
M4 feedramps
MPI 4150 chrome-lined barrel
MPI Bolt
Staking can be done at home, so I'm not as concerned with that.
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