COLT 6940 AR 15 CAN BE FUN FOR ANYONE

I will attempt to look for some. The piston rings appear to be the bolt rings but at lesser. The outer diameter is about .375 of an inch and also the internal diameter about .310 of the inch.The Colt LE6943CQB and CR6943 Monolithic limited barreled rifle aspect's Colt's regulation enforcement entirely unitized URG. Besides an uninterrupted total-du