This is a Pre Ban Colt, Government/Military only stamped on the lower receiver, AR15 A2 carbine with the heavy fire machine gun barrel, this is not an ordinary issue barrel. Its super accurate still after heavy firing. It has the low profile short cycle direct impingement system. That is how this rifle came from Colt. All SN's match with Colt "C"proof markings on the lower receiver, upper receiver, bolt, and barrel. I can email more pictures if you're interested.
**On consignment, please call me to see if it is still for sale. and please leave a message.****.
Will be shipped through my FFL.