Well, thank for posting those videos. I much as I like Lucas cinematography, watching an amateur gunfighter run around for 60 seconds doesn't lend much to the conversation.
I probably have 10,000+ rounds through a couple different SCAR-L/H and Mk20s now as a professional shooter, and I've spent the last 6 years as a instructor watching SCAR-Hs trickle though SDM/Sniper courses, so maybe add another 20,000 - 30,000 round on to that. Still 30,000 - 40,000 rounds isn't much more than a drop in the bucket and is arguably anecdotal. Baring empirical data, as I only bothered noting trends, the SCAR-H (Mk17 MOD 0 to be exact) have shown a tendency to break optics at rates higher than other platforms. The theory among my peers and one that seems plausible to me, is that the SCAR-H exhibates a resonating recoil impulse though the upper receiver that induces forces on optics that are not typically seen when mounted on other platforms.
Again I don't have data, I don't spend my day in the lab but as a professional shooter and instructor I do spend enough time doing this stuff to know when something is off. Ballpark failure rate from my perspective is hard to nail down, but Crane has crunched some numbers and apparently felt the need to put out guidance on optics and lasers. Yet here we still have people who bother with commenting "My Vortex whatever the fuck, has been running great for the last 4 years with 1k rounds". There have been training days durning pre-mission train ups where 1K is what I've shot before lunch.
