Well I got my new Olympic K3BA3M4 out on the range Saturday.  I put 80 rounds through it and not one hiccup - all rounds fed, fired and extracted perfectly w/ factory 30rd and "Royal Ordnance" steel 30 rounder.

I think I got it zeroed at the 25yard range.  2 questions:

I put 20 rounds in a 4" circle, shooting offhand at 25yards.   I have NO experience with an AR.  Is this the rifle's fault or mine?  Ammo was Federal American Eagle 55gr.  Shouldn't i expect better groupings than this?

When shooting at 50 yards, how do I adjust the elevation?  What do the numbers mean on the wheel?  

I am new to this type of rifle, so just bear with me.  I can use any advice.