From PolyFang, after 3 months and 10k rounds of ammo through Armalight barrels its showing no barrel wear.
https://www.thefirearmblog.com/blog/2019/04/05/10000-rounds-of-5-56-polyfrang-ammo-cause-zero-barrel-wear
https://www.thefirearmblog.com/blog/2019/04/05/10000-rounds-of-5-56-polyfrang-ammo-cause-zero-barrel-wear