Well I /am/ an old man, and my first car -- a '62 Galaxie 500 -- was purchased gently used with 102k miles on it. I put another 80k on it before the frame rusted through, but the engine and tranny were as original. Ditto my second car, a '69 Beetle, which I owned in the mileage span of 120k to 160k.
I recently bought a case of primers for more than those two cars cost me combined.
Ignore Alien Orders
I hate taking the turn down the road to threadjack, but it was well within my memory that a domestic car with 100k on the clock was generally considered "used up". Heck, Detroit didn't start adding a sixth digit to the left of the decimal on their odometers until the mid-to-late '80s (Pontiac wanted to seem European.)
Sure, you could do a lot better with a well-maintained example, but most weren't. Heck, the term "planned obsolescence" originated with Detroit.
With the AR15, I don't think there can be a standard. It's a big kid's lego set. So many of them are built from parts. When people ask me what AR15 I have, I'm sort of dumbfounded. Is it a Rainier Arms because the lower was bought from Rainier? Legally, yes, but that's only one part of many, and not even the part that matters on an AR15 for performance or reliability. So is it a BCM because of the upper? What about when I replace the barrel with an Afghan, should I just call it a Noveske at that point?
So, I usually just say, "It's a frankengun."
"Are you ready? Okay. Let's roll."- Last words of Todd Beamer
I wouldn't expect a properly sprung 10mm to be different.
The 1911 frame has massive buffering capacity. As does the slide. And the gun has huge locking surface area.
Sent from my SGH-T889 using Tapatalk