I just completed my A2 build this AM.  Haven't mounted the optics yet as I have not decided what to use.  Thinking about the Shepherd P2 but don't know anyone who has one or a local dealer where I can fondle one!  Anyway, here are the specs on the build.

Rock River Arms lower-stripped
M&A upper varmint kit:  20" hvy stainless bbl w/1 in 8 twist
RRA 2 stage NM trigger

Yet to be installed are the optics and a stock extension kit as the standard is too short for me.  Build was pretty simple with the addition of a couple of tools I made on the lathe to make spring/retainer installation easier.  Those little retainers for the pivot and takedown pins go a long ways when they get away from you!!  Not someting you have to have but it sure makes things easier-especially if you have old hands like me.  Will try and post pics when I get a chance.

brownells sales the pivot pin instalation tool for a buck or two. They are life savers.

I cant wait to see the pictures.