I have owned several. There used to be the old saw when it came to buying an AR- Stick to your ABC's, Armalite, Bushmaster and Colt. Great rifles, the anodizing should have a purple tinge when wiped down with CLP. For a few years they even had the contract for the Marines and Navy IIRC, their corrosion resistance was better than the old grey Colts.
Bushmaster started out as Quality Parts Company and were a lead contractor to Colt. They decided to build their own under the Bushmaster moniker.
Snag it up Dave, I regret getting rid of every one.....