One of things that changed was the BCG. The 11k serial gun above has the half moon BCG which sort of sucks. It does have a sweet CAR stock though. Does not have a sear block despite having the half moon BCG.
Here's a 6920 SOCOM lower, LE serial in the 265k range. I got this in 2013 and I think it was made around then. Wife has a 2013 6920 in the LE255000 range