I regretfully would like to offer a BRAND NEW IN BOX COLT 6721. (COLT DEFENSE)
Colt 6721, marked "AR15A3 Tactical Carbine" and "Colt Defense" on the left side. "LEO only" on the right side. Brand new in plastic bag in box with carry handle, colt 20rnd mag, manual, sling. Beautiful!
eta: forgot to say: this has the 1/9 twist heavy barrel.