I have a colt le6920 with the serial number starting with cr. I have also been soing some research and finding out that my upper receiver might not be made by colt as well. Cant really find much on the forge markings on it with it being a c and an a on it. I have attached pictures. Anyone that...

Just picked up my first Colt yesterday, and am already tinkering with it... I know many folks would (and have) recommended getting to know the stock LE6920 before changing or modifying anything, but I just can't resist... Right out of the box... Here is the Houge grip that was installed...