Spend a little bit extra and get a colt 6920 for $899. You can't beat that price. And in my opinion for a .223/5.56 rifle a 16" barrel is plenty. Shot placement and the ammo you use is more important when it comes to killing hogs with a rifle in 5.56, than comparing a 16in barrel to a 20in. Look...
If you noticed the flaws when you picked it up, the ffl should have told you not to accept it and send it back. He might not have thought it was a big deal, but to you it is. Did you buy it from an individual or from a dealer? Not sure if the warranty would work if you purchased from a...