I have a M&P15 optics ready compliant carbine. Flat top with no flashhider and pinned stock. I have the chance to trade even for NIB Olympic Arms K8 rifle. It has a 20" stainless bull barrel with free float hand guard. The OLY rifle was made in 2008.What are your thoughts? I hear its a real tack driver but I want and respect INGO's opinions the most. BTW, already have a dpms m4gery carbine so I will still have an AR for close up work. Thanks for your help.