It was an interesting video.
Looks like the vast majority of rounds were fired full auto. Add in a suppressor and that schedule was brutal and nothing 99% of shooters would ever be able to do.
Even the rental M-16s at the local indoor range are not abused that hard.
The barrel was fouled out, not shot out. A little gator skin won't hurt much but all that carbon and copper is a real problem.
The Huxwork Flow suppressor is notorious for fouling build up and that could have been causing the accuracy issues.
I suspect a muzzle bore diameter gauge would prove you wrong.
LOL.
Show the class a picture of a "muzzle bore diameter gauge".
I have Deltronic pins in .0001 steps to measure muzzle diameters.
I might have a bit better handle on how barrels die than average.
