I don't know if what I have would be a high end, low end or just an antique.....it is a Colt from the 80's.
I can't begin to tell you how many rounds have been down it....and really how do those people that say yea I have this or that and it has 9000 rounds in it....really you keep track, how do you know that.....sorry calling bs. Even if you only have one rifle that shoots that specific flavor of ammo, you really keep track of how many you buy or how many you reload....nope, never gonna buy it. You can guess....lets see I have this 1911, I shot a game every week that used 50 rounds, that went on for 8 weeks, practice was around 100 per week....ok I gots an basic idea....but I would never say this is what I shot in the gun.
Sorry for the rant, now back to the AR, all kinds of ammo from good to "bad" steel core "junk", stuff that would not work in others rifles, this thing has eaten. Nothing broken yet.
It is not something I shoot very often anymore, I think the last time it was out was around 10 years or so ago when my son used it for a CMP game.....I bought it because they said they are going to take them away from us, now I have it because it always works, and is one of those New York freindly flavors that are worth something up there.....I still have the 5 round mags as well, wish I had the box still but the washer flooded the basement and I lost all my boxes.