" Another FACT to consider is that course instructors see a huge sample size of rifles, and thousands of thousands of rounds every year, and they tend to see certain brands hold up better than others. When the rifles are run hard, the differences start to show. "
Meh. See, I AM an Instructor and a student. I have seen 2 day carbine classes in 85+ degree weather with rain/mud/sand, and 2000 rounds. Some of the most consistent rifles performing, coming and going to the courses are RRA and SIG. Those are two BRAND names that "they" HATE to see on that other forum as they must OBEY a brand name basis.
The differences DO start to show: the guys who bought/built the most expensive "mil-spec" are doing maintenance tear-downs instead of shooting, and/or distracting my manpower to get others to help them do it.
The " I am an Instructor " of tactical operations has turned instruction into a convoluted pile of salesman looking to cash in, and help their buddies cash in on the websites.
So the barrel is toast on a RRA after 10,000 rounds? Buy a new one; go to youtube and find the instructional on how to change it out. Big deal.
Yes, the chart is a supposed standard made by one guy. Companies like SIG and RRA are building outside the box, of the chart and thats good for the industry.
Some of the cool stuff out there now: the SIG AR in 7.62 that takes AK mags., and I think RRA has built one too. Good times.