I have a RRA standard length A4 308 on order. Does anybody have any experience with these rifles? What kind of accuracy can I expect from it? The RRA web sight advertises 1moa at 100yrds. I will want to change the handguard for a free float. Will any free float hand guard fit on this rifle? Also what else could I do to squeez as much as possible out of the rifle? Thanks for your help.