This brief article on TFB shows the dramatic effects of a tremendous amount of abuse in an AR15 barrel. Noveske N4 hammer forged barrel with between 80-100k rounds. The gas port erosion almost burned through the entire barrel.
The article also shows the results of 30K+ rounds through a 416R stainless steel Noveske barrel. Pretty impressive stuff.
http://www.thefirearmblog.com/blog/2016/10/27/ever-wondered-80-100k-rounds-fired-ar-15-barrel/
The article also shows the results of 30K+ rounds through a 416R stainless steel Noveske barrel. Pretty impressive stuff.
http://www.thefirearmblog.com/blog/2016/10/27/ever-wondered-80-100k-rounds-fired-ar-15-barrel/