sloughfoot
Grandmaster
So what are the maindifferences between an Olympic Arms/DPMS/Bushmaster and Noveske/BCM/Daniel Defense? (Not including "options" like chrome lined barrel and such which is for added durability) I know a big factor in some of the higher priced offerings is a weight advantage, but what else is there? Tighter tolerances? It seems as though tighter tolerances may make a rifle more accurate but less reliable (I work with a guy that just bought a $3000 1911 and had many malfunctions in his first range trip). Also, isn't the sloppier tolerances what makes the AK47 generally more "reliable" in extreme conditions (mud, water, sand, etc)?
The tolerances are the same for all AR 15 rifles. There is not a way to make one with tighter tolerances. Or even looser tolerances. There are just a few venders that make all the parts, that everybody uses, to mil-spec. All bets are off with the fancy coatings though. Maybe even headspace. Check out Krieger's announcement to no longer provide standard bolts with their chambered barrels for AR's. If you are using a chromed bolt, they want you to send it to them for chambering your new barrel.
BTW, I don't believe that Colt is the major supplier to the US Military. I think FN is.