A SIMPLE KEY FOR COLT 16 INCH UPPER UNVEILED

 Actually, I would not shoot a single.  Time to move on to a completely new rifle.  Get an LMT or HK if you want armed forces fashion pistons.    Colt has no interest in helping you out.  They deserted that project before their final bankruptcy.Getting and shipping and delivery by way of Charlie’s is straightforward, but there is some facts