Prebuilt FM9 or???

Looking to get myself an AR9 strictly for plinking. Through admittedly limited research, I came across the FM9 last night and found one available with a 5" barrel and almost checked out but I figured, before I did that, I should probably seek some guidance. So, would I be good going with an FM9 if I don't want to build my own and I'm just looking for a range AR9?