Yes, I love brown guns and when I finished my pistol kit, I did brown the barrel and nose cap. That was fun, but way easier with a pistol-size barrel in terms of making a humidity chamber for the browning process. Not sure that I’m ready to commit that much effort for this Lyman. But the barrel and other hardware certainly would look better (to my eye) browned.
As for the sites, I have already replaced the Lyman sites because (1) The rear site adjustment screw kept falling out, and (2) my eyes aren’t what they used to be and struggle to focus on the factory sites. I had to replace them with non-PC fiber optic sites. This is a hunting gun, so I was willing to sacrifice on the PC in order to increase accuracy and likelihood of an ethical harvest