As the receiver ring is heat treated and the barrel is made from high tensile steel, providing the surface finish on the threads is good and they are lightly lubricated there really should be no wear at all. When assembling and dis-assembling, the parts are only being rotated at hand speed and under no load, and even when tightening the final bit there is minimum load. One can also have the threads hard chromed which can be plated on super thin, 0.0002" is a good amount and is called Flash Chroming. The surface hardness will then be about 70 RC which is similar to carbide. Electroless Nickel is another method and is even harder. Just remember that one has to allow for an increase in thread thickness if you plate more than a couple of tenths in which case the thread will have to be slightly loose before plating. This may have to be experimented with first.

Waidmannsheil.