For sale 1 Colt AR 15 model #6731. Post ban A3 flat top 1-9 twist heavy barrel. Barrel has been threaded and a Wilson combat Muzzlebreak has been pined in place. New Unfired I have the original box,sling etc. Gun has been in a safe for last 9 yrs. Asking $1250 location Rochester. I can e-mail pics if interested.. thanks for looking.