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This range is local to me, and I often bring visiting friends here as it's a great tourist experience.
I'm jealous!
That's one of the places that I really want to visit if I ever head out that way again - I've been to Vegas with the family when I was a kid, but haven't had the chance to revisit as an adult. That and the tank driving - being that I don't gamble, I'd be going for all the other forms of entertainment there....and I hope the buffets are back, too.
This place is probably performing the most high round turnover on the AR platform anywhere on earth. Yes their various setups are limited, and mostly very mil spec. But most premium ARs actually stick very close to mil spec. There are some that make refinements that theoretically should extend parts life, and reliability (ie: POF roller cam, inconel gas tubes, etc). But all of them simply don't have the documented massive round count data on them, that mil spec has. Regardless of what their marketing claims.
The thread is extremely long, but it becomes obvious AR platform parts breakage is pretty consistent. As is lubrication schedules. Obviously there are other factors to consider such as firing schedule, and ammo quality.
I agree with all of these points - but to say that a properly spec'ed AR-15 requires lubrication every 200 rounds - and that higher end ARs are less tolerant of harsher running conditions and more sensitive to ammo are both bordering on exaggeration, particularly as based on both the referenced ARFCOM thread (which indeed is legendary, and is indeed often referenced particularly for those of us who have a "training/range beater" in the stable; that's a thread that I've cited in the past, too
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https://www.xdtalk.com/threads/lets-talk-bcgs-general-discussion.448803/#post-7835307), as well as the empirical data that virtually every competitive shooter and student who has attended high-round-count training classes can provide.
Similarly, while I agree that parts breakage is consistent -and therefore service life of said components must be paid mind (and dollars!
)- and lubrication required, these constraints are not exclusive to the AR-15 platform. Firearms are machines, and machines wear from use, and those wear components in-particular often require copious quality lubrication, refreshed at appropriate intervals. We see this with our automobiles (whether ICE or the newer electrics) as much as we see it with any other gun, be it the Glock or the 1911. To many, that we know about the service life of critical components and the maintenance requirements of a weapon system is much better than having a mystery: 9x19 Glocks and Mil-Spec AR15s both enjoy very well-known service intervals, with Armorer's Manuals from the manufacturer and also very highly-regarded gunsmiths (such as Dave Laubert of Defensive Creations, Chad Albrecht of SOTAR, etc.) having taught hundreds of civilian students. Knowing is not a bad thing - indeed, the lack of known service intervals was what almost turned me away from the XDm a few years ago, as I started to accrue more and more mileage and wear.
Definitely, much of this is affected by just how hard the weapon is used. Extended firing of the weapon at-cyclic - or, alternatively, neglect - will definitely impact the service life of every component. Nevertheless, this is again universal.
And certainly, there are those out there who make refinements that should extend parts life - but as you noted, the specs are the specs for a reason. While some of these companies (H&K, Knight's, Surefire, and LMT come to mind immediately) have impressive pedigree and their parts/guns have proven themselves in other contexts, there remains a reason why some of these these "improvements" have not been adopted for the unique rigors of military use. That said, to suggest that "higher-end" somehow implies less overall durability and/or reliability really isn't an accurate portrayal. If the gun/components are within spec (and there is not an unique tolerance-stacking issue), it should run, regardless of the price-tag that's hung on the barrel. "Tighter tolerances" does not equate with abridging specifications. Similarly, "looser tolerances" -if they fall outside specs- will also translate to problems and is no guaranty that the gun will be more tolerant of...well...anything
: what's not spec is simply that, not within specifications, and that is where the problem usually both begins and ends.
Regarding steel ammo, especially surplus steel ammo. Properly gassed guns centrally will not run it without issue. A combination of poor chamber sealing from the steel, and the poor quality powders.
Again, I respectfully disagree - my experience has been that a properly gassed AR-15, provided that nothing else is problematic (i.e. chamber dimensions), it should run steel-case. Invariably, when I see AR-15s that fail to reliably run steel case, it's because there are more problems than just gas-related.
While any or all of these issues may affect AR-10s differently, I have to point out yet again that I embarrassingly do not have the experience or knowledge to go there
- my dissent here is purely with how the reliability and durability of the AR-15 is characterized.
The AR-15, built within specs and given the proper care as with any other firearm, is as durable and reliable platform as any other.