I have a Bushy upper and the barrel is beautiful except a wear make on the side. It hasn't damaged the steel just rubbed off the dark gray finish, almost to the point that you can see bare metal. Any thoughts on fixing it?
A yellowish marking on the brass deflector (just behind the ejection port) is normal, that is brass off the shells. It's not actually finish worn off, it's a buildup of brass. Can be cleaned, but why bother?
When they kick at your front door How you gonna come? With your hands on your head Or on the trigger of your gun?