I purchased this complete Colt 6920 M4 upper (16" M4 Barrel) as a future M4 upgrade to my 6520 Ar15 A2 Government model. I have decided to sell it rather than have it sit in a box in my closet. This is a Colt 6920 complete upper that is legal on a pre-ban lower only. The upper is brand new with both holes being standard sized. ALL components are standard factory Colt parts as included on a 6920 model. It features a removable carry handle with the RAS markings. I purchased for $750 plus shipping...I am selling now, NEVER used, for $600 plus shipping to your location (I will be happy to estimate the shipping costs with the help of the purchaser) . I apologize for not having a picture in this ad, but I still can't figure out how to do it. Please email me and I will be happy to email a picture of the upper back to you. Thanks in advance.