100% authentic, this is a Colt factory Upper that did not make the QA inspection at Charlies for cosmetic reasons
Be careful, there are many fakes out there. Buy from a trusted Source. Charlie's is a Colt authorized dealer, and this part comes from Colt as a spare, or also from a new Colt rifle, for which Charlie's has disassembled.
Factory new or new take-off, Colt upper receiver with Colt CAGE Code marked on the left side, stamped, engraved or dot peened into the side. Some of these are factory new. Most are take-offs from new guns or upper receiver groups. Some are purchased as a part. Most have world famous Colt oil on them. Inside has a gray dry lube finish. Marked M4 in the front, and with M4 feedramps.
This is a blemised item, often with scratches on the top rail, or we have uppers that look like they have been dropped. Graded Medium, rated B to A-. Colt is known for rough handling, but our blems are a little more banged up that you would expect from a new part.
Note: Pics do show specific blems.