figured resurrecting an older thread is better than starting a new one...
Mines from December or January, and I don't think I noticed the "polished blue" end cap until i was reading a post on another forum. Looking closely at it I have a hard time calling it polished blue...but I also don't have another 20" rifle to compare it to, only 16" rifles and while it's not as dull looking as those it's far from what I'd call polished blue.
Other things that were pointed out in that thread:
Carbine feedramps-whats the significant of this ?
Non F marked FSB-doesn't seem to affect mine, and in any case I thought i read somewhere that Colt is making all sight bases the same size? anyone know if this is true?
Incorrect barrel markings
CAR prefix serial number-LE or CAR, really makes no difference to me.
Lightweight LE marked lowers
It's funny the things people nitpick on. The incorrect barrel markings and LWLE rollstamp I can see, but I remember when FN released their 20" rifle and people were complaining about similar things, specially incorrect markings on the FCG.