COLT UPPER RECEIVER FOR SALE FOR DUMMIES

Be aware:  The Colt 6940 household of rifles are proprietary made, with couple of user serviceable parts.  Specific instruments are necessary to take out the barrel nut and barrel.  The fuel program is exclusive and not made to be replaced with mil-spec parts. The Colt LE6943CQB and CR6943 Monolithic limited barreled rifle attribute's Colt's re