Rock River Arms AR-15

[Solid]

Don't underestimate Stag- they make all their own major components- including their own tooling and dies- in house, so everything fits like a glove. Not to mention awesome customer service.

I am a Stag fanboy, you may have noticed.

Both RRA and Stag come from the same manufacture, CMT. Stag just happens to be their retail line.

Here is the "infamous" chart of AR brands. http://www.m4carbine.net/showthread.php?t=6642

Most of the specs are just "fluff", but a few are important to take into consideration.
-BCG, these are extremely important to proper AR function
-5.56 chamber
-Chrome chamber and bore

There are other important things, but it all depends on ones usage. For some 1x7 twist is important, but not really important if you only run 55gr.