Originally Posted by
3 AE
My 6920, purchased in 10/2010, has a very faint MPC etched into the bolt. No "C" anywhere on the carrier. Sealed box, yadda,yadda, etc. Buddy of mine purchased his from same local gun shop a month later. His serial # just over 1000 higher than mine, his carrier has the "C". Me thinks it's just the way it goes. Just like some BCM carriers don't have the "BCM" logo on it. If you haven't had a problem, don't think about it. Replace bolt/BCG if and when it's needed. Otherwise you'll just be wondering about something that's doesn't need wondering about. If you're still going to fret about it, call Colt and see what THEY say.