I recently had the opportunity to acquire a mid 80s Colt 6600 HBAR. I’m not as familiar with the Colt rifles, would someone be willing to value the gun?
It has never been shot, is all original with the original magazines (2).
Market value on an unfired R6600 AR-15A2 Sporter HBAR (if this is what you are looking at) would be around $1200 (+/-) depending on where you are. I have seen them go for as much as $1600 on some auction sites, but again, it depends on where you are and what you are willing to pay. In a state where they can only have pre-ban ARs, they would be worth considerably more.