...in the making of their valve components, if one knows? I suspect it is maybe 6061T4, maybe? However, 6061 is supposed to be more resistant to oxidation so quickly.
I ask because it seems that the valves simply do not hold up over [short] time in regards to internal degradation. For example, while resealing my little 1377 carbine for sake of resealing it, the valve has gone to absolute crud inside. Cleaned it all up, of course. The threads on the front valve half have even become victim of the awful degradation. I use the oils advised from Mac1, nothing has ever seemed to prevent it.
Now, my 392, which has an aluminum front half, brass back, doesn't seem to be nearly as bad. More discolration than anything else.
"Well, I thought it was a rabbit but it turned out to be Bear Grylls in a rabbit hide."