I just got my first AR-15 together this afternoon. It is a dedicated plink/varmint gun. We are covered up in coyotes, hogs and cats and I've always wanted an AR so it made for a good excuse. I'll be headed to the range this Sunday with several assorted boxes of Black Hills hoping to find a grouper. 18" RRA Varmint A4 CAA Stock Armalite Base/Ring Combo Leupold Mark 4 PR 3.5 X 10 .