Pre-ban NIB Colt R6721 Tactical Carbines, consecutive S/Ns BD0000xx & xx+1. Considered the rarest model of pre-ban production Colt AR15 rifles, these are 2 of only 134 that exist. These particular 2 guns may also be the only NIB consecutive S/N set that exists. For sale as set only, $10,000 shipped in CONUS. Certified funds; 3 day inspection. Not for sale to states where prohibited.
These are my last two R6721s; I am selling them to pay for continuing treatment of my Class III illness. Email firstname.lastname@example.org, or call John at (512) 328-0065 in Austin, TX.
Picture & specs here (current, near-identical, Colt LEO model):