A SIMPLE KEY FOR COLT IAR UPPER FOR SALE UNVEILED

Take note:  The Colt 6940 family of rifles are proprietary intended, with number of consumer serviceable parts.  Distinct tools are needed to eliminate the barrel nut and barrel.  The gas system is exclusive rather than designed to be replaced with mil-spec parts. When you are competing in a contest with the gun, acquiring upgraded Colt AR15 Up