Ooooh, not the CAI!!! If I was gonna trade an AR for an M1, it sure as heck wouldn't be for a CAI...
LOTS of issues...mostly due to out-of-spec problems...hrm...well, I'd call 'em if you have issues...they're reportedly good on warranty issues...
Fishbed is Spot On...get M-1's from the CMP!!!
Of course, you can get a DPMS AR15 from Walmart for $597 now...