A SIMPLE KEY FOR COLT IAR UPPER FOR SALE UNVEILED

 Actually, I would not shoot 1.  Time to maneuver on to a different rifle.  Get an LMT or HK if you like armed service style pistons.    Colt has little interest in assisting you out.  They deserted that project right before their last personal bankruptcy.I was not able to find nearly anything concerning this, could you backlink a supply? I d