No.
I own four
, and have been shooting AR's and working on them since 1978. I don't claim to know it all, but I know enough. I currently own a 20" Colt HBAR, 16" LMT Defender, 20" Armalite M15 with stainless match barrel and a 16" DPMS. And about 4 others have passed through here.
Like I said, don't want to fight. There were just too many comments that make me say WTF.
Just one example.
COLT is the most MilSpec, they build them for the Military to military spec.
First of all, "milspec" simply means it is built to the specs set forth by the military and has nothing to do with accuracy. AR's that are not "milspec" can be fine accurate shooters.
What are the Milspecs? Click here:
http://www.biggerhammer.net/ar15/milspec/
Many hate "the M4 Chart" but I'll post it here as an example of what are the main differences in the brands on it only.
I'm not going to go post by post, I'll just add this.
Accuracy varies by person and application. But to make it simple...
A quality barrel and chamber shooting quality ammo that are matched to the barrel twist rate is the first and most important factor to achieve the best accuracy. Quality optics sure help also. The most overlooked factor is the man behind the trigger, his setup and experience. Chromed bore barrels in general are not as accurate as non chromed.
The very best match barrel shooting unmatched ammo is not going to be accurate.
Here are some rough guidelines for twist rate and bullets:
1-in-14" 55gr or less
1-in-12" 35gr up to 55-60gr
1-in-9" 45gr-75gr, possibly up to 77 if you're lucky
1-in-8", 1-in-7" 45gr - 80+gr
Technically, it isn't about the WEIGHT, but the LENGTH of the bullet, as well as air density and velocity.
Brand of the AR is not all that important, matching quality components is. Nothing is written in stone, you have to try different ammo to find what your setup likes.
Like I said, I don't want to fight with anyone. I also hope nobody thinks me a smartass or know it all. I am not, I don't know it all and l hope to learn more about shooting everyday.
I have snow to shovel, we got hit hard with the damn stuff and it's not even winter yet!